82_FR_14164 82 FR 14113 - Special Conditions: Textron Aviation Inc. Model 700 Airplane; Isolation of Airplane Electronic System Security Protection From Unauthorized Internal Access

82 FR 14113 - Special Conditions: Textron Aviation Inc. Model 700 Airplane; Isolation of Airplane Electronic System Security Protection From Unauthorized Internal Access

DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration

Federal Register Volume 82, Issue 51 (March 17, 2017)

Page Range14113-14115
FR Document2017-05333

These special conditions are issued for the Textron Aviation Inc. (Textron) Model 700 airplane. This airplane will have a novel or unusual design feature when compared to the state of technology envisioned in the airworthiness standards for transport-category airplanes. This design feature is airplane electronic systems and networks that allow access, from aircraft internal sources (e.g., wireless devices, Internet connectivity), to the airplane's previously isolated, internal, electronic components. The applicable airworthiness regulations do not contain adequate or appropriate safety standards for this design feature. These special conditions contain the additional safety standards that the Administrator considers necessary to establish a level of safety equivalent to that established by the existing airworthiness standards.

Federal Register, Volume 82 Issue 51 (Friday, March 17, 2017)
[Federal Register Volume 82, Number 51 (Friday, March 17, 2017)]
[Rules and Regulations]
[Pages 14113-14115]
From the Federal Register Online  [www.thefederalregister.org]
[FR Doc No: 2017-05333]


-----------------------------------------------------------------------

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 25

[Docket No. FAA-2016-9489; Special Conditions No. 25-649-SC]


Special Conditions: Textron Aviation Inc. Model 700 Airplane; 
Isolation of Airplane Electronic System Security Protection From 
Unauthorized Internal Access

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final special conditions; request for comments.

-----------------------------------------------------------------------

SUMMARY: These special conditions are issued for the Textron Aviation 
Inc. (Textron) Model 700 airplane. This airplane will have a novel or 
unusual design feature when compared to the state of technology 
envisioned in the airworthiness standards for transport-category 
airplanes. This design feature is airplane electronic systems and 
networks that allow access, from aircraft internal sources (e.g., 
wireless devices, Internet connectivity), to the airplane's previously 
isolated, internal, electronic components. The applicable airworthiness 
regulations do not contain adequate or appropriate safety standards for 
this design feature. These special conditions contain the additional 
safety standards that the Administrator considers necessary to 
establish a level of safety equivalent to that established by the 
existing airworthiness standards.

DATES: This action is effective on Textron on March 17, 2017. We must 
receive your comments by May 1, 2017.

ADDRESSES: Send comments identified by docket number FAA-2016-9489 
using any of the following methods:
    [squ] Federal eRegulations Portal: Go to http://www.regulations.gov/and follow the online instructions for sending your 
comments electronically.
    [squ] Mail: Send comments to Docket Operations, M-30, U.S. 
Department of Transportation (DOT), 1200 New Jersey Avenue SE., Room 
W12-140, West Building Ground Floor, Washington, DC 20590-0001.
    [squ] Hand Delivery or Courier: Take comments to Docket Operations 
in Room W12-140 of the West Building Ground Floor at 1200 New Jersey 
Avenue SE., Washington, DC, between 9 a.m. and 5 p.m., Monday through 
Friday, except Federal holidays.
    [squ] Fax: Fax comments to Docket Operations at 202-493-2251.
    Privacy: The FAA will post all comments it receives, without 
change, to http://www.regulations.gov/, including any personal 
information the commenter provides. Using the search function of the 
docket Web site, anyone can find and read the electronic form of all 
comments received into any FAA docket, including the name of the 
individual sending the comment (or signing the comment for an 
association, business, labor union, etc.). DOT's complete Privacy Act 
Statement can be found in the Federal Register published on April 11, 
2000 (65 FR 19477-19478), as well as at http://DocketsInfo.dot.gov/.
    Docket: Background documents or comments received may be read at 
http://www.regulations.gov/ at any time. Follow the online instructions 
for accessing the docket or go to Docket Operations in Room W12-140 of 
the West Building Ground Floor at 1200 New Jersey Avenue SE., 
Washington, DC, between 9 a.m. and 5 p.m., Monday through Friday, 
except Federal holidays.

FOR FURTHER INFORMATION CONTACT: Varun Khanna, FAA, Airplane and 
Flightcrew Interface, ANM-111, Transport Airplane Directorate, Aircraft 
Certification Service, 1601 Lind Avenue SW., Renton, Washington 98057-
3356; telephone 425-227-1298; facsimile 425-227-1320.

SUPPLEMENTARY INFORMATION: The FAA has determined that notice of, and 
opportunity for prior public comment on, these special conditions is 
impracticable because these procedures would significantly delay 
issuance of the design approval, and thus delivery, of the affected 
airplane.
    In addition, the substance of these special conditions has been 
subject to the public-comment process in several prior instances with 
no substantive comments received. The FAA therefore finds that good 
cause exists for making these special conditions effective upon 
publication in the Federal Register.

Comments Invited

    We invite interested people to take part in this rulemaking by 
sending written comments, data, or views. The most helpful comments 
reference a specific portion of the special conditions, explain the 
reason for any recommended change, and include supporting data.
    We will consider all comments we receive by the closing date for 
comments. We may change these special conditions based on the comments 
we receive.

Background

    On November 20, 2014, Textron applied for a type certificate for 
their new Model 700 airplane. The Textron

[[Page 14114]]

Model 700 airplane is a twin-engine, transport-category executive 
airplane with seating for 2 crewmembers and 12 passengers, and a 
maximum takeoff weight of 38,514 lbs.

Type Certification Basis

    Under the provisions of Title 14, Code of Federal Regulations (14 
CFR) 21.17, Textron must show that the Model 700 airplane meets the 
applicable provisions of part 25, as amended by Amendments 25-1 through 
25-139, 25-141, and 25-143.
    If the Administrator finds that the applicable airworthiness 
regulations (i.e., 14 CFR part 25) do not contain adequate or 
appropriate safety standards for the Textron Model 700 airplane because 
of a novel or unusual design feature, special conditions are prescribed 
under the provisions of Sec.  21.16.
    Special conditions are initially applicable to the model for which 
they are issued. Should the type certificate for that model be amended 
later to include any other model that incorporates the same novel or 
unusual design feature, these special conditions would also apply to 
the other model under Sec.  21.101.
    In addition to the applicable airworthiness regulations and special 
conditions, the Textron Model 700 airplane must comply with the fuel-
vent and exhaust-emission requirements of 14 CFR part 34 and the noise-
certification requirements of 14 CFR part 36.
    The FAA issues special conditions, as defined in 14 CFR 11.19, in 
accordance with Sec.  11.38, and they become part of the type 
certification basis under Sec.  21.17(a)(2).

Novel or Unusual Design Features

    The Textron Model 700 airplane will incorporate the following novel 
or unusual design feature:
    Airplane electronic systems and networks that allow access, from 
airplane internal sources (e.g., wireless devices, Internet 
connectivity), to the previously isolated airplane electronic assets.

Discussion

    Networks, both in safety-related and non-safety-related 
applications, have been implemented in existing commercial-production 
airplanes. However, network security considerations and functions have 
played a relatively minor role in the certification of such systems 
because of the isolation, protection mechanisms, and limited 
connectivity between these networks.
    To provide an understanding of the airplane electronic equipment, 
systems, and assets, these special conditions use the concept of 
domains. However, this does not prescribe any particular architecture.
    The aircraft-control domain consists of the airplane electronic 
systems, equipment, instruments, networks, servers, software and 
hardware components, databases, etc., which are part of the type design 
of the airplane and are installed in the airplane to enable the safe 
operation of the airplane. These can also be referred to as flight-
safety-related systems, and include flight controls, communication, 
display, monitoring, navigation, and related systems.
    The airline-information-services domain generally consists of 
functions that the airplane operator manages or controls, such as 
administrative functions, cabin-support functions, etc.
    The passenger-information-services domain consists of all functions 
required to provide the passengers with information.
    The Textron Model 700 airplane design introduces the potential for 
access to aircraft-control domain and airline-information-services 
domain by unauthorized persons through the passenger-information-
services domain; and the security vulnerabilities related to the 
introduction of viruses, worms, user mistakes, and intentional sabotage 
of airplane networks, systems, and databases.
    For electronic systems and assets security in these domains, the 
level of protection provided against security threats should be based 
on a security-risk assessment, noting that the level of protection 
could differ between domains and within domains, depending on the 
security threat. For each security vulnerability and airplane 
electronic asset, Textron should identify in which domain the asset 
will be addressed.
    In addition, the operating systems for current airplane systems are 
usually and historically proprietary. Therefore, they are not as 
susceptible to corruption from worms, viruses, and other malicious 
actions as are more widely used commercial operating systems, because 
access to the design details of these proprietary operating systems is 
limited to the system developer and airplane integrator. Some airplanes 
are equipped with operating systems that are widely used and 
commercially available from third-party software suppliers. The 
security vulnerabilities of these operating systems may be more widely 
known than are the vulnerabilities of proprietary operating systems 
that the avionics manufacturers currently use.
    These special conditions contain the additional safety standards 
that the Administrator considers necessary to establish a level of 
safety equivalent to that established by the existing airworthiness 
standards.

Applicability

    As discussed above, these special conditions are applicable to the 
Textron Model 700 airplane. Should Textron apply at a later date for a 
change to the type certificate to include another model incorporating 
the same novel or unusual design feature, these special conditions 
would apply to that model as well.

Conclusion

    This action affects only a certain novel or unusual design feature 
on one model of airplane. It is not a rule of general applicability.
    The substance of these special conditions has been subjected to the 
notice and comment period in several prior instances and has been 
derived without substantive change from those previously issued. It is 
unlikely that prior public comment would result in a significant change 
from the substance contained herein. Therefore, because a delay would 
significantly affect the certification of the airplane, the FAA has 
determined that prior public notice and comment are unnecessary and 
impracticable, and good cause exists for adopting these special 
conditions upon publication in the Federal Register. The FAA is 
requesting comments to allow interested persons to submit views that 
may not have been submitted in response to the prior opportunities for 
comment described above.

List of Subjects in 14 CFR Part 25

    Aircraft, Aviation safety, Reporting and recordkeeping 
requirements.

    The authority citation for these special conditions is as follows:

    Authority: 49 U.S.C. 106(g), 40113, 44701, 44702, 44704.

The Special Conditions

    Accordingly, pursuant to the authority delegated to me by the 
Administrator, the following special conditions are issued as part of 
the type certification basis for Textron Model 700 airplanes.
    1. The applicant must ensure that the design provides isolation 
from, or airplane electronic-system security protection against, access 
by unauthorized sources internal to the airplane. The design must 
prevent inadvertent and malicious changes to,

[[Page 14115]]

and all adverse impacts upon, airplane equipment, systems, networks, or 
other assets required for safe flight and operations.
    2. The applicant must establish appropriate procedures to allow the 
operator to ensure that continued airworthiness of the airplane is 
maintained, including all post-type-certification modifications that 
may have an impact on the approved electronic-system security 
safeguards.

    Issued in Renton, Washington, on February 10, 2017.
Michael Kaszycki,
Assistant Manager, Transport Airplane Directorate, Aircraft 
Certification Service.
[FR Doc. 2017-05333 Filed 3-16-17; 8:45 am]
 BILLING CODE 4910-13-P



                                                                    Federal Register / Vol. 82, No. 51 / Friday, March 17, 2017 / Rules and Regulations                                          14113

                                                this characteristic by impact and                       DEPARTMENT OF TRANSPORTATION                          including any personal information the
                                                puncture testing, and testing to failure.                                                                     commenter provides. Using the search
                                                The applicant may conduct this test                     Federal Aviation Administration                       function of the docket Web site, anyone
                                                with or without any glass coating that                                                                        can find and read the electronic form of
                                                may be utilized in the design.                          14 CFR Part 25                                        all comments received into any FAA
                                                                                                        [Docket No. FAA–2016–9489; Special                    docket, including the name of the
                                                   2. Strength—In addition to meeting
                                                                                                        Conditions No. 25–649–SC]                             individual sending the comment (or
                                                the load requirements for all flight and
                                                                                                                                                              signing the comment for an association,
                                                landing loads, including any of the                                                                           business, labor union, etc.). DOT’s
                                                                                                        Special Conditions: Textron Aviation
                                                applicable emergency-landing                            Inc. Model 700 Airplane; Isolation of                 complete Privacy Act Statement can be
                                                conditions in subparts C & D of 14 CFR                  Airplane Electronic System Security                   found in the Federal Register published
                                                part 25, the glass components that are                  Protection From Unauthorized Internal                 on April 11, 2000 (65 FR 19477–19478),
                                                located such that they are not protected                Access                                                as well as at http://DocketsInfo.
                                                from contact with cabin occupants must                                                                        dot.gov/.
                                                not fail due to abusive loading, such as                AGENCY:  Federal Aviation                                Docket: Background documents or
                                                impact from occupants stumbling into,                   Administration (FAA), DOT.                            comments received may be read at
                                                leaning against, sitting on, or performing              ACTION: Final special conditions; request             http://www.regulations.gov/ at any time.
                                                other intentional or unintentional                      for comments.                                         Follow the online instructions for
                                                forceful contact with the glass                         SUMMARY:    These special conditions are              accessing the docket or go to Docket
                                                component. The applicant must assess                    issued for the Textron Aviation Inc.                  Operations in Room W12–140 of the
                                                the effect of design details such as                    (Textron) Model 700 airplane. This                    West Building Ground Floor at 1200
                                                geometric discontinuities or surface                    airplane will have a novel or unusual                 New Jersey Avenue SE., Washington,
                                                finish, including but not limited to                    design feature when compared to the                   DC, between 9 a.m. and 5 p.m., Monday
                                                embossing and etching.                                  state of technology envisioned in the                 through Friday, except Federal holidays.
                                                   3. Retention—The glass component,                    airworthiness standards for transport-                FOR FURTHER INFORMATION CONTACT:
                                                as installed in the airplane, must not                  category airplanes. This design feature               Varun Khanna, FAA, Airplane and
                                                come free of its restraint or mounting                  is airplane electronic systems and                    Flightcrew Interface, ANM–111,
                                                system in the event of an emergency                     networks that allow access, from aircraft             Transport Airplane Directorate, Aircraft
                                                                                                        internal sources (e.g., wireless devices,             Certification Service, 1601 Lind Avenue
                                                landing, considering both the
                                                                                                        Internet connectivity), to the airplane’s             SW., Renton, Washington 98057–3356;
                                                directional loading and resulting
                                                                                                        previously isolated, internal, electronic             telephone 425–227–1298; facsimile
                                                rebound conditions. The applicant must
                                                                                                        components. The applicable                            425–227–1320.
                                                assess the effect of design details such
                                                                                                        airworthiness regulations do not contain              SUPPLEMENTARY INFORMATION: The FAA
                                                as geometric discontinuities or surface
                                                                                                        adequate or appropriate safety standards              has determined that notice of, and
                                                finish, including but not limited to
                                                                                                        for this design feature. These special                opportunity for prior public comment
                                                embossing and etching.                                  conditions contain the additional safety              on, these special conditions is
                                                   4. Instructions for Continued                        standards that the Administrator                      impracticable because these procedures
                                                Airworthiness: The instructions for                     considers necessary to establish a level              would significantly delay issuance of
                                                continued airworthiness must reflect the                of safety equivalent to that established              the design approval, and thus delivery,
                                                method used to fasten the panel to the                  by the existing airworthiness standards.              of the affected airplane.
                                                cabin interior, and must ensure the                     DATES: This action is effective on                       In addition, the substance of these
                                                reliability of the methods used (e.g., life             Textron on March 17, 2017. We must                    special conditions has been subject to
                                                limit of adhesives, or clamp                            receive your comments by May 1, 2017.                 the public-comment process in several
                                                connection). The applicant must define                  ADDRESSES: Send comments identified                   prior instances with no substantive
                                                any inspection methods and intervals                    by docket number FAA–2016–9489                        comments received. The FAA therefore
                                                based upon adhesion data from the                       using any of the following methods:                   finds that good cause exists for making
                                                manufacturer of the adhesive, or upon                      b Federal eRegulations Portal: Go to               these special conditions effective upon
                                                actual adhesion-test data, if necessary.                http://www.regulations.gov/and follow                 publication in the Federal Register.
                                                                                                        the online instructions for sending your              Comments Invited
                                                  Issued in Renton, Washington, on February
                                                                                                        comments electronically.
                                                14, 2017.
                                                                                                           b Mail: Send comments to Docket                      We invite interested people to take
                                                Michael Kaszycki,                                       Operations, M–30, U.S. Department of                  part in this rulemaking by sending
                                                Acting Manager, Transport Airplane                      Transportation (DOT), 1200 New Jersey                 written comments, data, or views. The
                                                Directorate, Aircraft Certification Service.            Avenue SE., Room W12–140, West                        most helpful comments reference a
                                                [FR Doc. 2017–05330 Filed 3–16–17; 8:45 am]             Building Ground Floor, Washington, DC                 specific portion of the special
                                                BILLING CODE 4910–13–P                                  20590–0001.                                           conditions, explain the reason for any
                                                                                                           b Hand Delivery or Courier: Take                   recommended change, and include
                                                                                                        comments to Docket Operations in                      supporting data.
                                                                                                        Room W12–140 of the West Building                       We will consider all comments we
                                                                                                        Ground Floor at 1200 New Jersey                       receive by the closing date for
                                                                                                        Avenue SE., Washington, DC, between 9                 comments. We may change these special
mstockstill on DSK3G9T082PROD with RULES




                                                                                                        a.m. and 5 p.m., Monday through                       conditions based on the comments we
                                                                                                        Friday, except Federal holidays.                      receive.
                                                                                                           b Fax: Fax comments to Docket
                                                                                                                                                              Background
                                                                                                        Operations at 202–493–2251.
                                                                                                           Privacy: The FAA will post all                       On November 20, 2014, Textron
                                                                                                        comments it receives, without change,                 applied for a type certificate for their
                                                                                                        to http://www.regulations.gov/,                       new Model 700 airplane. The Textron


                                           VerDate Sep<11>2014   19:31 Mar 16, 2017   Jkt 241001   PO 00000   Frm 00003   Fmt 4700   Sfmt 4700   E:\FR\FM\17MRR1.SGM   17MRR1


                                                14114               Federal Register / Vol. 82, No. 51 / Friday, March 17, 2017 / Rules and Regulations

                                                Model 700 airplane is a twin-engine,                       To provide an understanding of the                 proprietary operating systems that the
                                                transport-category executive airplane                   airplane electronic equipment, systems,               avionics manufacturers currently use.
                                                with seating for 2 crewmembers and 12                   and assets, these special conditions use                These special conditions contain the
                                                passengers, and a maximum takeoff                       the concept of domains. However, this                 additional safety standards that the
                                                weight of 38,514 lbs.                                   does not prescribe any particular                     Administrator considers necessary to
                                                                                                        architecture.                                         establish a level of safety equivalent to
                                                Type Certification Basis                                                                                      that established by the existing
                                                                                                           The aircraft-control domain consists
                                                   Under the provisions of Title 14, Code               of the airplane electronic systems,                   airworthiness standards.
                                                of Federal Regulations (14 CFR) 21.17,                  equipment, instruments, networks,                     Applicability
                                                Textron must show that the Model 700                    servers, software and hardware
                                                airplane meets the applicable provisions                components, databases, etc., which are                  As discussed above, these special
                                                of part 25, as amended by Amendments                    part of the type design of the airplane               conditions are applicable to the Textron
                                                25–1 through 25–139, 25–141, and 25–                    and are installed in the airplane to                  Model 700 airplane. Should Textron
                                                143.                                                    enable the safe operation of the airplane.            apply at a later date for a change to the
                                                   If the Administrator finds that the                  These can also be referred to as flight-              type certificate to include another
                                                applicable airworthiness regulations                    safety-related systems, and include                   model incorporating the same novel or
                                                (i.e., 14 CFR part 25) do not contain                   flight controls, communication, display,              unusual design feature, these special
                                                adequate or appropriate safety standards                monitoring, navigation, and related                   conditions would apply to that model as
                                                for the Textron Model 700 airplane                      systems.                                              well.
                                                because of a novel or unusual design                       The airline-information-services                   Conclusion
                                                feature, special conditions are                         domain generally consists of functions
                                                prescribed under the provisions of                                                                              This action affects only a certain
                                                                                                        that the airplane operator manages or                 novel or unusual design feature on one
                                                § 21.16.                                                controls, such as administrative
                                                   Special conditions are initially                                                                           model of airplane. It is not a rule of
                                                                                                        functions, cabin-support functions, etc.              general applicability.
                                                applicable to the model for which they                     The passenger-information-services
                                                are issued. Should the type certificate                                                                         The substance of these special
                                                                                                        domain consists of all functions                      conditions has been subjected to the
                                                for that model be amended later to                      required to provide the passengers with
                                                include any other model that                                                                                  notice and comment period in several
                                                                                                        information.                                          prior instances and has been derived
                                                incorporates the same novel or unusual                     The Textron Model 700 airplane
                                                design feature, these special conditions                                                                      without substantive change from those
                                                                                                        design introduces the potential for                   previously issued. It is unlikely that
                                                would also apply to the other model                     access to aircraft-control domain and
                                                under § 21.101.                                                                                               prior public comment would result in a
                                                                                                        airline-information-services domain by                significant change from the substance
                                                   In addition to the applicable
                                                                                                        unauthorized persons through the                      contained herein. Therefore, because a
                                                airworthiness regulations and special
                                                                                                        passenger-information-services domain;                delay would significantly affect the
                                                conditions, the Textron Model 700
                                                                                                        and the security vulnerabilities related              certification of the airplane, the FAA
                                                airplane must comply with the fuel-vent
                                                                                                        to the introduction of viruses, worms,                has determined that prior public notice
                                                and exhaust-emission requirements of
                                                                                                        user mistakes, and intentional sabotage               and comment are unnecessary and
                                                14 CFR part 34 and the noise-
                                                                                                        of airplane networks, systems, and                    impracticable, and good cause exists for
                                                certification requirements of 14 CFR
                                                                                                        databases.                                            adopting these special conditions upon
                                                part 36.
                                                   The FAA issues special conditions, as                   For electronic systems and assets                  publication in the Federal Register. The
                                                defined in 14 CFR 11.19, in accordance                  security in these domains, the level of               FAA is requesting comments to allow
                                                with § 11.38, and they become part of                   protection provided against security                  interested persons to submit views that
                                                the type certification basis under                      threats should be based on a security-                may not have been submitted in
                                                § 21.17(a)(2).                                          risk assessment, noting that the level of             response to the prior opportunities for
                                                                                                        protection could differ between                       comment described above.
                                                Novel or Unusual Design Features                        domains and within domains,
                                                                                                        depending on the security threat. For                 List of Subjects in 14 CFR Part 25
                                                  The Textron Model 700 airplane will
                                                incorporate the following novel or                      each security vulnerability and airplane                Aircraft, Aviation safety, Reporting
                                                unusual design feature:                                 electronic asset, Textron should identify             and recordkeeping requirements.
                                                  Airplane electronic systems and                       in which domain the asset will be                       The authority citation for these
                                                networks that allow access, from                        addressed.                                            special conditions is as follows:
                                                airplane internal sources (e.g., wireless                  In addition, the operating systems for               Authority: 49 U.S.C. 106(g), 40113, 44701,
                                                devices, Internet connectivity), to the                 current airplane systems are usually and              44702, 44704.
                                                previously isolated airplane electronic                 historically proprietary. Therefore, they
                                                assets.                                                 are not as susceptible to corruption from             The Special Conditions
                                                                                                        worms, viruses, and other malicious                     Accordingly, pursuant to the
                                                Discussion                                              actions as are more widely used                       authority delegated to me by the
                                                  Networks, both in safety-related and                  commercial operating systems, because                 Administrator, the following special
                                                non-safety-related applications, have                   access to the design details of these                 conditions are issued as part of the type
                                                been implemented in existing                            proprietary operating systems is limited              certification basis for Textron Model
                                                commercial-production airplanes.                        to the system developer and airplane                  700 airplanes.
mstockstill on DSK3G9T082PROD with RULES




                                                However, network security                               integrator. Some airplanes are equipped                 1. The applicant must ensure that the
                                                considerations and functions have                       with operating systems that are widely                design provides isolation from, or
                                                played a relatively minor role in the                   used and commercially available from                  airplane electronic-system security
                                                certification of such systems because of                third-party software suppliers. The                   protection against, access by
                                                the isolation, protection mechanisms,                   security vulnerabilities of these                     unauthorized sources internal to the
                                                and limited connectivity between these                  operating systems may be more widely                  airplane. The design must prevent
                                                networks.                                               known than are the vulnerabilities of                 inadvertent and malicious changes to,


                                           VerDate Sep<11>2014   19:31 Mar 16, 2017   Jkt 241001   PO 00000   Frm 00004   Fmt 4700   Sfmt 4700   E:\FR\FM\17MRR1.SGM   17MRR1


                                                                    Federal Register / Vol. 82, No. 51 / Friday, March 17, 2017 / Rules and Regulations                                         14115

                                                and all adverse impacts upon, airplane                  SUPPLEMENTARY INFORMATION:                            Novel or Unusual Design Features
                                                equipment, systems, networks, or other                                                                          The Model 787–10 airplane will
                                                assets required for safe flight and                     Background
                                                                                                                                                              incorporate the following novel or
                                                operations.                                                On July 30, 2013, Boeing applied for               unusual design feature:
                                                  2. The applicant must establish                       an amendment to Type Certificate No.                    A flaps-up vertical modal suppression
                                                appropriate procedures to allow the                     T00021SE to include the new Model                     system.
                                                operator to ensure that continued                       787–10 airplane. This twin-engine,
                                                airworthiness of the airplane is                                                                              Discussion
                                                                                                        transport-category airplane is a
                                                maintained, including all post-type-                    stretched-fuselage derivative of the 787–                The Boeing Model 787–10 will add a
                                                certification modifications that may                    9, with maximum seating capacity of                   new flaps-up vertical modal-
                                                have an impact on the approved                                                                                suppression (F0VMS) system to the
                                                                                                        440 passengers. The 787–10 has a
                                                electronic-system security safeguards.                                                                        Normal mode of the primary flight-
                                                                                                        maximum takeoff weight of 560,000 lbs.
                                                  Issued in Renton, Washington, on February                                                                   control system (PFCS). The F0VMS
                                                10, 2017.                                               Type Certification Basis                              system is needed to satisfy the flutter-
                                                Michael Kaszycki,                                                                                             damping margin requirements of
                                                                                                           Under the provisions of Title 14, Code             § 25.629 and the means-of-compliance
                                                Assistant Manager, Transport Airplane                   of Federal Regulations (14 CFR) 21.101,
                                                Directorate, Aircraft Certification Service.                                                                  provisions in Advisory Circular (AC)
                                                                                                        Boeing must show that the Model 787–                  25.629–1B. This system will be used in
                                                [FR Doc. 2017–05333 Filed 3–16–17; 8:45 am]
                                                                                                        10 airplane meets the applicable                      lieu of typical methods of improving the
                                                BILLING CODE 4910–13–P
                                                                                                        provisions of the regulations listed in               flutter characteristics of an airplane,
                                                                                                        Type Certificate No. T00021SE or the                  such as increasing the torsional stiffness
                                                                                                        applicable regulations in effect on the               of the wing or adding wingtip ballast
                                                DEPARTMENT OF TRANSPORTATION
                                                                                                        date of application for the change,                   weights.
                                                Federal Aviation Administration                         except for earlier amendments as agreed                  The F0VMS system is an active
                                                                                                        upon by the FAA.                                      modal-suppression system that will
                                                14 CFR Part 25                                                                                                provide additional damping to an
                                                                                                           In addition, the certification basis
                                                                                                                                                              already stable, but low-damped, 3Hz
                                                [Docket No. FAA–2016–6137; Special                      includes other regulations, special
                                                                                                                                                              symmetric wing, nacelle, and body
                                                Conditions No. 25–644–SC]                               conditions, and exemptions that are not               aeroelastic mode of the airplane. This
                                                                                                        relevant to these proposed special                    feedback-control system will maintain
                                                Special Conditions: The Boeing                          conditions. Type Certificate No.                      adequate damping margins to flutter.
                                                Company Model 787–10 Airplane;                          T00021SE will be updated to include a                 The F0VMS system accomplishes this
                                                Aeroelastic Stability Requirements,                     complete description of the certification             by oscillating the elevators, and, when
                                                Flaps-Up Vertical Modal-Suppression                     basis for this airplane model.                        needed, the flaperons.
                                                System                                                     If the Administrator finds that the                   Because Boeing’s flutter analysis
                                                AGENCY:  Federal Aviation                               applicable airworthiness regulations                  shows that the 3Hz mode is stable and
                                                Administration (FAA), DOT.                              (i.e., 14 CFR part 25) do not contain                 does not flutter, the F0VMS system is
                                                                                                        adequate or appropriate safety standards              not an active flutter-suppression system,
                                                ACTION: Final special conditions.
                                                                                                        for the Model 787–10 airplane because                 but, rather, a damping-augmentation
                                                SUMMARY:    These special conditions are                of a novel or unusual design feature,                 system. At this time, the FAA is not
                                                issued for the Boeing Company (Boeing)                  special conditions are prescribed under               prepared to accept an active flutter-
                                                Model 787–10 airplane. This airplane                    the provisions of § 21.16.                            suppression system that suppresses a
                                                will have a novel or unusual design                                                                           divergent flutter mode in the
                                                                                                           Special conditions are initially                   operational or design envelope of the
                                                feature when compared to the state of                   applicable to the model for which they
                                                technology envisioned in the                                                                                  airplane.
                                                                                                        are issued. Should the type certificate                  This will be the first time an active
                                                airworthiness standards for transport-                  for that model be amended later to
                                                category airplanes. This design feature                                                                       modal-suppression system will be used
                                                                                                        include any other model that                          for § 25.629 compliance. The use of this
                                                is a flaps-up vertical modal-suppression
                                                                                                        incorporates the same novel or unusual                new active modal-suppression system
                                                system, which is in lieu of traditional
                                                                                                        design feature, or should any other                   for flutter compliance is novel or
                                                methods of improving airplane flutter
                                                                                                        model already included on the same                    unusual when compared to the
                                                characteristics. The applicable
                                                                                                        type certificate be modified to                       technology envisioned in the current
                                                airworthiness regulations do not contain
                                                adequate or appropriate safety standards                incorporate the same novel or unusual                 airworthiness standards. Consequently,
                                                for this design feature. These special                  design feature, these special conditions              special conditions are required in
                                                conditions contain the additional safety                would also apply to the other model                   consideration of the effects of this new
                                                standards that the Administrator                        under § 21.101.                                       system on the aeroelastic stability of the
                                                considers necessary to establish a level                   In addition to the applicable                      airplane, both in the normal and failed
                                                of safety equivalent to that established                airworthiness regulations and special                 state, to maintain the level of safety
                                                by the existing airworthiness standards.                conditions, the Model 787–10 airplane                 intended by § 25.629.
                                                                                                        must comply with the fuel-vent and                       These special conditions contain the
                                                DATES: Effective April 17, 2017.
                                                                                                        exhaust-emission requirements of 14                   additional safety standards that the
                                                FOR FURTHER INFORMATION CONTACT:                                                                              Administrator considers necessary to
                                                                                                        CFR part 34, and the noise-certification
mstockstill on DSK3G9T082PROD with RULES




                                                Wael Nour, FAA, Airframe and Cabin                                                                            establish a level of safety equivalent to
                                                Safety Branch, ANM–115, Transport                       requirements of 14 CFR part 36.
                                                                                                                                                              that established by the existing
                                                Airplane Directorate, Aircraft                             The FAA issues special conditions, as              airworthiness standards.
                                                Certification Service, 1601 Lind Avenue                 defined in 14 CFR 11.19, in accordance
                                                SW., Renton, Washington 98057–3356;                     with § 11.38, and they become part of                 Discussion of Comments
                                                telephone 425–227–2143; facsimile                       the type certification basis under                      Notice of Proposed Special
                                                425–227–1320.                                           § 21.101.                                             Conditions No. 25–16–05–SC for the


                                           VerDate Sep<11>2014   19:31 Mar 16, 2017   Jkt 241001   PO 00000   Frm 00005   Fmt 4700   Sfmt 4700   E:\FR\FM\17MRR1.SGM   17MRR1



Document Created: 2017-03-17 02:48:58
Document Modified: 2017-03-17 02:48:58
CategoryRegulatory Information
CollectionFederal Register
sudoc ClassAE 2.7:
GS 4.107:
AE 2.106:
PublisherOffice of the Federal Register, National Archives and Records Administration
SectionRules and Regulations
ActionFinal special conditions; request for comments.
DatesThis action is effective on Textron on March 17, 2017. We must receive your comments by May 1, 2017.
ContactVarun Khanna, FAA, Airplane and Flightcrew Interface, ANM-111, Transport Airplane Directorate, Aircraft Certification Service, 1601 Lind Avenue SW., Renton, Washington 98057- 3356; telephone 425-227-1298; facsimile 425-227-1320.
FR Citation82 FR 14113 
CFR AssociatedAircraft; Aviation Safety and Reporting and Recordkeeping Requirements

2025 Federal Register | Disclaimer | Privacy Policy
USC | CFR | eCFR