82 FR 24231 - Special Conditions: Textron Aviation Inc., Model 700 Airplane; Non-Rechargeable Lithium Battery Installations

DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration

Federal Register Volume 82, Issue 101 (May 26, 2017)

Page Range		24231-24233
FR Document		2017-10842

These special conditions are issued for non-rechargeable lithium battery installations on the Textron Aviation Inc. (Textron) Model 700 airplane. Non-rechargeable lithium batteries are a novel or unusual design feature when compared to the state of technology envisioned in the airworthiness standards for transport category airplanes. 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 101 (Friday, May 26, 2017)

[Federal Register Volume 82, Number 101 (Friday, May 26, 2017)]
[Rules and Regulations]
[Pages 24231-24233]
From the Federal Register Online [www.thefederalregister.org]
[FR Doc No: 2017-10842]

[[Page 24231]]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 25

[Docket No. FAA-2017-0377; Special Conditions No. 25-681-SC]

Special Conditions: Textron Aviation Inc., Model 700 Airplane;
Non-Rechargeable Lithium Battery Installations

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final special conditions; request for comment.

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SUMMARY: These special conditions are issued for non-rechargeable
lithium battery installations on the Textron Aviation Inc. (Textron)
Model 700 airplane. Non-rechargeable lithium batteries are a novel or
unusual design feature when compared to the state of technology
envisioned in the airworthiness standards for transport category
airplanes. 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 May 26, 2017. We must
receive your comments by July 10, 2017.

ADDRESSES: Send comments identified by docket number FAA-2017-0377
using any of the following methods:
Federal eRegulations Portal: Go to http://www.regulations.gov/ and follow the online instructions for sending
your comments electronically.
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.
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.
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: Nazih Khaouly, Airplane and Flight
Crew Interface Branch, ANM-111, Transport Airplane Directorate,
Aircraft Certification Service, 1601 Lind Avenue SW., Renton,
Washington, 98057-3356; telephone 425-227-2432; facsimile 425-227-1149.

SUPPLEMENTARY INFORMATION:

Future Requests for Installation of Non-Rechargeable Lithium Batteries

The FAA anticipates that non-rechargeable lithium batteries will be
installed in most makes and models of transport category airplanes. We
intend to require special conditions for certification projects
involving non-rechargeable lithium battery installations to address
certain safety issues until we can revise the airworthiness
requirements. Applying special conditions to these installations across
the range of transport category airplanes will ensure regulatory
consistency.
Typically, the FAA issues special conditions after receiving an
application for type certificate approval of a novel or unusual design
feature. However, the FAA has found that the presence of non-
rechargeable lithium batteries in certification projects is not always
immediately identifiable, since the battery itself may not be the focus
of the project. Meanwhile, the inclusion of these batteries has become
virtually ubiquitous on in-production transport category airplanes,
which shows that there will be a need for these special conditions.
Also, delaying the issuance of special conditions until after each
design application is received could lead to costly certification
delays. Therefore the FAA finds it necessary to issue special
conditions applicable to these battery installations on particular
makes and models of aircraft.
On April 22, 2016, the FAA published special conditions no. 25-612-
SC in the Federal Register (81 FR 23573) applicable to Gulfstream
Aerospace Corporation for the GVI airplane. Those were the first
special conditions the FAA issued for non-rechargeable lithium battery
installations. We explained in that document our decision to make those
special conditions effective one year after publication in the Federal
Register, which is April 22, 2017. In those special conditions, the FAA
stated its intention to apply non-rechargeable lithium battery special
conditions to design changes on other makes and models applied for
after this same date.
Section 1205 of the FAA Reauthorization Act of 1996 requires the
FAA to consider the extent to which Alaska is not served by
transportation modes other than aviation and to establish appropriate
regulatory distinctions when modifying airworthiness regulations that
affect intrastate aviation in Alaska. In consideration of this
requirement and the overall impact on safety, the FAA does not intend
to require non-rechargeable lithium battery special conditions for
design changes that only replace a 121.5 megahertz (MHz) emergency
locator transmitter (ELT) with a 406 MHz ELT that meets Technical
Standard Order C126b, or later revision, on transport airplanes
operating only in Alaska. This will support our efforts of encouraging
operators in Alaska to upgrade to a 406 MHz ELT. These ELTs provide
significantly improved accuracy for lifesaving services to locate an
accident site in Alaskan terrain. The FAA considers that the safety
benefits from upgrading to a 406 MHz ELT for Alaskan operations will
outweigh the battery fire risk.

Comments Invited

The substance of these special conditions has been subjected to the
notice and comment period in 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, 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.
We invite interested people to take part in this rulemaking by
sending

[[Page 24232]]

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 a
new Model 700 airplane. The Model 700 is a twin engine, transport
category airplane with a passenger seating capacity of 12 and a
projected maximum takeoff weight of 38,514 pounds.
The FAA is issuing these special conditions for non-rechargeable
lithium battery installations on the Model 700 airplane. The current
battery requirements in title 14, Code of Federal Regulations (14 CFR)
part 25 are inadequate for addressing an airplane with non-rechargeable
lithium batteries.

Type Certification Basis

Under the provisions of 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 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 airplane 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 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, and the FAA must issue a
finding of regulatory adequacy under Sec. 611 of Public Law 92-574,
the ``Noise Control Act of 1972.''
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.

Novel or Unusual Design Feature

The novel or unusual design feature is the installation of non-
rechargeable lithium batteries.
For the purpose of these special conditions, we refer to a battery
and battery system as a battery. A battery system consists of the
battery and any protective, monitoring, and alerting circuitry or
hardware inside or outside of the battery. It also includes vents
(where necessary) and packaging.

Discussion

The FAA derived the current regulations governing installation of
batteries in transport category airplanes from Civil Air Regulations
(CAR) 4b.625(d) as part of the recodification of CAR 4b that
established 14 CFR part 25 in February 1965. This recodification
basically reworded the CAR 4b battery requirements, which are currently
in Sec. 25.1353(b)(1) through (4). Non-rechargeable lithium batteries
are novel and unusual with respect to the state of technology
considered when these requirements were codified. These batteries
introduce higher energy levels into airplane systems through new
chemical compositions in various battery cell sizes and construction.
Interconnection of these cells in battery packs introduces failure
modes that require unique design considerations, such as provisions for
thermal management.
Recent events involving rechargeable and non-rechargeable lithium
batteries prompted the FAA to initiate a broad evaluation of these
energy storage technologies. In January 2013, two independent events
involving rechargeable lithium-ion batteries revealed unanticipated
failure modes. A National Transportation Safety Board (NTSB) letter to
the FAA, dated May 22, 2014, which is available at http://www.ntsb.gov,
filename A-14-032-036.pdf, describes these events.
On July 12, 2013, an event involving a non-rechargeable lithium
battery in an emergency locator transmitter installation demonstrated
unanticipated failure modes. The United Kingdom's Air Accidents
Investigation Branch Bulletin S5/2013 describes this event.
Some known uses of rechargeable and non-rechargeable lithium
batteries on airplanes include:
Flight deck and avionics systems such as displays, global
positioning systems, cockpit voice recorders, flight data recorders,
underwater locator beacons, navigation computers, integrated avionics
computers, satellite network and communication systems, communication
management units, and remote-monitor electronic line-replaceable units;
Cabin safety, entertainment, and communications equipment,
including emergency locator transmitters, life rafts, escape slides,
seatbelt air bags, cabin management systems, Ethernet switches, routers
and media servers, wireless systems, internet and in-flight
entertainment systems, satellite televisions, remotes, and handsets;
Systems in cargo areas including door controls, sensors,
video surveillance equipment, and security systems.
Some known potential hazards and failure modes associated with non-
rechargeable lithium batteries are:
Internal failures: In general, these batteries are
significantly more susceptible to internal failures that can result in
self-sustaining increases in temperature and pressure (i.e., thermal
runaway) than their nickel-cadmium or lead-acid counterparts. The
metallic lithium can ignite, resulting in a self-sustaining fire or
explosion.
Fast or imbalanced discharging: Fast discharging or an
imbalanced discharge of one cell of a multi-cell battery may create an
overheating condition that results in an uncontrollable venting
condition, which in turn leads to a thermal event or an explosion.
Flammability: Unlike nickel-cadmium and lead-acid
batteries, lithium batteries use higher energy and current in an
electrochemical system that can be configured to maximize energy
storage of lithium. They also use liquid electrolytes that can be
extremely flammable. The electrolyte, as well as the electrodes, can
serve as a source of fuel for an external fire if the battery casing is
breached.
Special condition no. 1 of these special conditions requires that
each individual cell within a non-rechargeable lithium battery be
designed to maintain safe temperatures and pressures. Special condition
no. 2 addresses these same issues but for the entire battery. Special
condition no. 2 requires the battery be designed to prevent propagation
of a thermal event, such as self-sustained, uncontrollable increases in
temperature or pressure from one cell to adjacent cells.
Special conditions nos. 1 and 2 are intended to ensure that the
non-rechargeable lithium battery and its cells are designed to
eliminate the potential for uncontrollable failures. However, a certain
number of failures will occur due to various factors beyond the control
of the battery designer. Therefore, other special conditions are

[[Page 24233]]

intended to protect the airplane and its occupants if failure occurs.
Special conditions 3, 7, and 8 are self-explanatory.
Special condition no. 4 makes it clear that the flammable fluid
fire protection requirements of Sec. 25.863 apply to non-rechargeable
lithium battery installations. Section 25.863 is applicable to areas of
the airplane that could be exposed to flammable fluid leakage from
airplane systems. Non-rechargeable lithium batteries contain an
electrolyte that is a flammable fluid.
Special condition no. 5 requires that each non-rechargeable lithium
battery installation not damage surrounding structure or adjacent
systems, equipment, or electrical wiring from corrosive fluids or gases
that may escape in such a way as to cause a major or more severe
failure condition.
While special condition no. 5 addresses corrosive fluids and gases,
special condition no. 6 addresses heat. Special condition no. 6
requires that each non-rechargeable lithium battery installation have
provisions to prevent any hazardous effect on airplane structure or
systems caused by the maximum amount of heat the battery installation
can generate due to any failure of it or its individual cells. The
means of meeting special conditions nos. 5 and 6 may be the same, but
the requirements are independent and address different hazards.
These special conditions apply to all non-rechargeable lithium
battery installations in lieu of Sec. 25.1353(b)(1) through (4) at
Amendment 25-123. Sections 25.1353(b)(1) through (4) at Amendment 25-
123 remain in effect for other battery installations.
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

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.
These special conditions are only applicable to design changes
applied for after the effective date.
These special conditions are not applicable to changes to
previously certified non-rechargeable lithium battery installations
where the only change is either cosmetic or to relocate the
installation to improve the safety of the airplane and occupants.
Previously certified non-rechargeable lithium battery installations, as
used in this paragraph, are those installations approved for
certification projects applied for on or before the effective date of
these special conditions. A cosmetic change is a change in appearance
only, and does not change any function or safety characteristic of the
battery installation. These special conditions are also not applicable
to unchanged, previously certified non-rechargeable lithium battery
installations that are affected by a change in a manner that improves
the safety of its installation. The FAA determined that these
exclusions are in the public interest because the need to meet all of
the special conditions might otherwise deter these design changes that
improve safety.

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 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, 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

0
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 the Textron Model 700 airplane.

Non-Rechargeable Lithium Battery Installations

In lieu of Sec. 25.1353(b)(1) through (4) at Amendment 25-123,
each non-rechargeable lithium battery installation must:
1. Be designed to maintain safe cell temperatures and pressures
under all foreseeable operating conditions to prevent fire and
explosion.
2. Be designed to prevent the occurrence of self-sustaining,
uncontrollable increases in temperature or pressure.
3. Not emit explosive or toxic gases, either in normal operation or
as a result of its failure, that may accumulate in hazardous quantities
within the airplane.
4. Meet the requirements of Sec. 25.863.
5. Not damage surrounding structure or adjacent systems, equipment,
or electrical wiring from corrosive fluids or gases that may escape in
such a way as to cause a major or more severe failure condition.
6. Have provisions to prevent any hazardous effect on airplane
structure or systems caused by the maximum amount of heat it can
generate due to any failure of it or its individual cells.
7. Have a failure sensing and warning system to alert the
flightcrew if its failure affects safe operation of the airplane.
8. Have a means for the flightcrew or maintenance personnel to
determine the battery charge state if the battery's function is
required for safe operation of the airplane.

Note: A battery system consists of the battery and any
protective, monitoring, and alerting circuitry or hardware inside or
outside of the battery. It also includes vents (where necessary) and
packaging. For the purpose of these special conditions, a
``battery'' and ``battery system'' are referred to as a battery.

Issued in Renton, Washington, on May 17, 2017.
Michael Kaszycki,
Assistant Manager, Transport Airplane Directorate, Aircraft
Certification Service.
[FR Doc. 2017-10842 Filed 5-25-17; 8:45 am]
BILLING CODE 4910-13-P

24232 Federal Register / Vol. 82, No. 101 / Friday, May 26, 2017 / Rules and Regulations

written comments, data, or views. The Novel or Unusual Design Feature remote-monitor electronic line-
most helpful comments reference a The novel or unusual design feature is replaceable units;
specific portion of the special the installation of non-rechargeable • Cabin safety, entertainment, and
conditions, explain the reason for any lithium batteries. communications equipment, including
recommended change, and include For the purpose of these special emergency locator transmitters, life
supporting data. conditions, we refer to a battery and rafts, escape slides, seatbelt air bags,
We will consider all comments we battery system as a battery. A battery cabin management systems, Ethernet
receive by the closing date for system consists of the battery and any switches, routers and media servers,
comments. We may change these special protective, monitoring, and alerting wireless systems, internet and in-flight
conditions based on the comments we circuitry or hardware inside or outside entertainment systems, satellite
receive. of the battery. It also includes vents televisions, remotes, and handsets;
(where necessary) and packaging. • Systems in cargo areas including
Background
door controls, sensors, video
On November 20, 2014, Textron Discussion surveillance equipment, and security
applied for a type certificate for a new The FAA derived the current systems.
Model 700 airplane. The Model 700 is regulations governing installation of Some known potential hazards and
a twin engine, transport category batteries in transport category airplanes failure modes associated with non-
airplane with a passenger seating from Civil Air Regulations (CAR) rechargeable lithium batteries are:
capacity of 12 and a projected maximum 4b.625(d) as part of the recodification of • Internal failures: In general, these
takeoff weight of 38,514 pounds. CAR 4b that established 14 CFR part 25 batteries are significantly more
The FAA is issuing these special in February 1965. This recodification susceptible to internal failures that can
conditions for non-rechargeable lithium basically reworded the CAR 4b battery result in self-sustaining increases in
battery installations on the Model 700 requirements, which are currently in temperature and pressure (i.e., thermal
airplane. The current battery § 25.1353(b)(1) through (4). Non- runaway) than their nickel-cadmium or
requirements in title 14, Code of Federal rechargeable lithium batteries are novel lead-acid counterparts. The metallic
Regulations (14 CFR) part 25 are and unusual with respect to the state of lithium can ignite, resulting in a self-
inadequate for addressing an airplane technology considered when these sustaining fire or explosion.
with non-rechargeable lithium batteries. requirements were codified. These • Fast or imbalanced discharging:
Type Certification Basis batteries introduce higher energy levels Fast discharging or an imbalanced
into airplane systems through new discharge of one cell of a multi-cell
Under the provisions of 14 CFR 21.17, chemical compositions in various battery may create an overheating
Textron must show that the Model 700 battery cell sizes and construction. condition that results in an
airplane meets the applicable provisions Interconnection of these cells in battery uncontrollable venting condition, which
of part 25, as amended by Amendments packs introduces failure modes that in turn leads to a thermal event or an
25–1 through 25–139, 25–141 and 25– require unique design considerations, explosion.
143. such as provisions for thermal • Flammability: Unlike nickel-
If the Administrator finds that the management. cadmium and lead-acid batteries,
applicable airworthiness regulations Recent events involving rechargeable lithium batteries use higher energy and
(i.e., 14 CFR part 25) do not contain and non-rechargeable lithium batteries current in an electrochemical system
adequate or appropriate safety standards prompted the FAA to initiate a broad that can be configured to maximize
for the Textron 700 airplane because of evaluation of these energy storage energy storage of lithium. They also use
a novel or unusual design feature, technologies. In January 2013, two liquid electrolytes that can be extremely
special conditions are prescribed under independent events involving flammable. The electrolyte, as well as
the provisions of § 21.16. rechargeable lithium-ion batteries the electrodes, can serve as a source of
Special conditions are initially revealed unanticipated failure modes. A fuel for an external fire if the battery
applicable to the airplane model for National Transportation Safety Board casing is breached.
which they are issued. Should the type (NTSB) letter to the FAA, dated May 22, Special condition no. 1 of these
certificate for that model be amended 2014, which is available at http:// special conditions requires that each
later to include any other model that www.ntsb.gov, filename A–14–032– individual cell within a non-
incorporates the same novel or unusual 036.pdf, describes these events. rechargeable lithium battery be designed
design feature, these special conditions On July 12, 2013, an event involving to maintain safe temperatures and
would also apply to the other model a non-rechargeable lithium battery in an pressures. Special condition no. 2
under § 21.101. emergency locator transmitter addresses these same issues but for the
In addition to the applicable installation demonstrated unanticipated entire battery. Special condition no. 2
airworthiness regulations and special failure modes. The United Kingdom’s requires the battery be designed to
conditions, the Textron Model 700 must Air Accidents Investigation Branch prevent propagation of a thermal event,
comply with the fuel vent and exhaust Bulletin S5/2013 describes this event. such as self-sustained, uncontrollable
emission requirements of 14 CFR part Some known uses of rechargeable and increases in temperature or pressure
34 and the noise certification non-rechargeable lithium batteries on from one cell to adjacent cells.
requirements of 14 CFR part 36, and the airplanes include: Special conditions nos. 1 and 2 are
FAA must issue a finding of regulatory • Flight deck and avionics systems intended to ensure that the non-
mstockstill on DSK30JT082PROD with RULES

adequacy under § 611 of Public Law 92– such as displays, global positioning rechargeable lithium battery and its
574, the ‘‘Noise Control Act of 1972.’’ systems, cockpit voice recorders, flight cells are designed to eliminate the
The FAA issues special conditions, as data recorders, underwater locator potential for uncontrollable failures.
defined in 14 CFR 11.19, in accordance beacons, navigation computers, However, a certain number of failures
with § 11.38, and they become part of integrated avionics computers, satellite will occur due to various factors beyond
the type certification basis under network and communication systems, the control of the battery designer.
§ 21.17. communication management units, and Therefore, other special conditions are

VerDate Sep<11>2014 17:49 May 25, 2017 Jkt 241001 PO 00000 Frm 00022 Fmt 4700 Sfmt 4700 E:\FR\FM\26MYR1.SGM 26MYR1

Federal Register / Vol. 82, No. 101 / Friday, May 26, 2017 / Rules and Regulations 24233

intended to protect the airplane and its the airplane and occupants. Previously rechargeable lithium battery installation
occupants if failure occurs. certified non-rechargeable lithium must:
Special conditions 3, 7, and 8 are self- battery installations, as used in this 1. Be designed to maintain safe cell
explanatory. paragraph, are those installations temperatures and pressures under all
Special condition no. 4 makes it clear approved for certification projects foreseeable operating conditions to
that the flammable fluid fire protection applied for on or before the effective prevent fire and explosion.
requirements of § 25.863 apply to non- date of these special conditions. A 2. Be designed to prevent the
rechargeable lithium battery cosmetic change is a change in occurrence of self-sustaining,
installations. Section 25.863 is appearance only, and does not change uncontrollable increases in temperature
applicable to areas of the airplane that any function or safety characteristic of or pressure.
could be exposed to flammable fluid the battery installation. These special 3. Not emit explosive or toxic gases,
leakage from airplane systems. Non- conditions are also not applicable to either in normal operation or as a result
rechargeable lithium batteries contain unchanged, previously certified non- of its failure, that may accumulate in
an electrolyte that is a flammable fluid. rechargeable lithium battery hazardous quantities within the
Special condition no. 5 requires that installations that are affected by a airplane.
each non-rechargeable lithium battery change in a manner that improves the 4. Meet the requirements of § 25.863.
installation not damage surrounding safety of its installation. The FAA 5. Not damage surrounding structure
structure or adjacent systems, determined that these exclusions are in or adjacent systems, equipment, or
equipment, or electrical wiring from the public interest because the need to electrical wiring from corrosive fluids or
corrosive fluids or gases that may escape meet all of the special conditions might gases that may escape in such a way as
in such a way as to cause a major or otherwise deter these design changes to cause a major or more severe failure
more severe failure condition. that improve safety. condition.
While special condition no. 5 6. Have provisions to prevent any
addresses corrosive fluids and gases, Conclusion
hazardous effect on airplane structure or
special condition no. 6 addresses heat. This action affects only a certain systems caused by the maximum
Special condition no. 6 requires that novel or unusual design feature on one amount of heat it can generate due to
each non-rechargeable lithium battery model of airplane. It is not a rule of any failure of it or its individual cells.
installation have provisions to prevent general applicability. 7. Have a failure sensing and warning
any hazardous effect on airplane The substance of these special system to alert the flightcrew if its
structure or systems caused by the conditions has been subjected to the failure affects safe operation of the
maximum amount of heat the battery notice and comment period in prior airplane.
installation can generate due to any instances and has been derived without 8. Have a means for the flightcrew or
failure of it or its individual cells. The substantive change from those maintenance personnel to determine the
means of meeting special conditions previously issued. It is unlikely that battery charge state if the battery’s
nos. 5 and 6 may be the same, but the prior public comment would result in a function is required for safe operation of
requirements are independent and significant change from the substance the airplane.
address different hazards. contained herein. Therefore, the FAA
These special conditions apply to all Note: A battery system consists of the
has determined that prior public notice battery and any protective, monitoring, and
non-rechargeable lithium battery and comment are unnecessary and alerting circuitry or hardware inside or
installations in lieu of § 25.1353(b)(1) impracticable, and good cause exists for outside of the battery. It also includes vents
through (4) at Amendment 25–123. adopting these special conditions upon (where necessary) and packaging. For the
Sections 25.1353(b)(1) through (4) at publication in the Federal Register. The purpose of these special conditions, a
Amendment 25–123 remain in effect for FAA is requesting comments to allow ‘‘battery’’ and ‘‘battery system’’ are referred to
other battery installations. interested persons to submit views that as a battery.
These special conditions contain the may not have been submitted in
additional safety standards that the Issued in Renton, Washington, on May 17,
response to the prior opportunities for 2017.
Administrator considers necessary to comment described above.
establish a level of safety equivalent to Michael Kaszycki,
that established by the existing List of Subjects in 14 CFR Part 25 Assistant Manager, Transport Airplane
airworthiness standards. Directorate, Aircraft Certification Service.
Aircraft, Aviation safety, Reporting
[FR Doc. 2017–10842 Filed 5–25–17; 8:45 am]
Applicability and recordkeeping requirements.
BILLING CODE 4910–13–P
These special conditions are The authority citation for these
applicable to the Textron Model 700 special conditions is as follows:
airplane. Should Textron apply at a later Authority: 49 U.S.C. 106(g), 40113, 44701, DEPARTMENT OF TRANSPORTATION
date for a change to the type certificate 44702, 44704.
to include another model incorporating Federal Aviation Administration
The Special Conditions
the same novel or unusual design
feature, these special conditions would ■ Accordingly, pursuant to the authority 14 CFR Part 25
apply to that model as well. delegated to me by the Administrator,
These special conditions are only the following special conditions are [Docket No. FAA–2017–0387; Special
Conditions No. 25–682–SC]
applicable to design changes applied for issued as part of the type certification
mstockstill on DSK30JT082PROD with RULES

after the effective date. basis for the Textron Model 700 Special Conditions: The Boeing
These special conditions are not airplane. Company, Model 787–9 Series
applicable to changes to previously Airplanes; Non-Rechargeable Lithium
certified non-rechargeable lithium Non-Rechargeable Lithium Battery
Installations Battery Installations
battery installations where the only
change is either cosmetic or to relocate In lieu of § 25.1353(b)(1) through (4) AGENCY:Federal Aviation
the installation to improve the safety of at Amendment 25–123, each non- Administration (FAA), DOT.

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Document Created: 2017-05-26 02:23:29
Document Modified: 2017-05-26 02:23:29

Category		Regulatory Information
Collection		Federal Register
sudoc Class		AE 2.7: GS 4.107: AE 2.106:
Publisher		Office of the Federal Register, National Archives and Records Administration
Section		Rules and Regulations
Action		Final special conditions; request for comment.
Dates		This action is effective on Textron on May 26, 2017. We must receive your comments by July 10, 2017.
Contact		Nazih Khaouly, Airplane and Flight Crew Interface Branch, ANM-111, Transport Airplane Directorate, Aircraft Certification Service, 1601 Lind Avenue SW., Renton, Washington, 98057-3356; telephone 425-227-2432; facsimile 425-227-1149.
FR Citation		82 FR 24231
CFR Associated		Aircraft; Aviation Safety and Reporting and Recordkeeping Requirements

82 FR 24231 - Special Conditions: Textron Aviation Inc., Model 700 Airplane; Non-Rechargeable Lithium Battery Installations

DEPARTMENT OF TRANSPORTATIONFederal Aviation Administration

Federal Register Volume 82, Issue 101 (May 26, 2017)

DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration