80 FR 10632 - Special Conditions: Bombardier Aerospace Incorporated, Models BD-500-1A10 and BD-500-1A11 Series Airplanes; Electronic Flight Control System: Pitch and Roll Limiting Functions

DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration

Federal Register Volume 80, Issue 39 (February 27, 2015)

Page Range		10632-10633
FR Document		2015-04050

This action proposes special conditions for the Bombardier Aerospace Models BD-500-1A10 and BD-500-1A11 Series Airplanes. These airplanes will have a novel or unusual design feature associated with the fly-by-wire electronic flight control system (EFCS) that limits pitch- and roll-attitude functions to prevent the airplane from attaining certain pitch attitudes and roll angles. This system generates the actual surface commands that provide for stability augmentation and flight control for all three-airplane axes (longitudinal, lateral, and directional). The applicable airworthiness regulations do not contain adequate or appropriate safety standards for this design feature. These proposed 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 80 Issue 39 (Friday, February 27, 2015)

[Federal Register Volume 80, Number 39 (Friday, February 27, 2015)]
[Proposed Rules]
[Pages 10632-10633]
From the Federal Register Online [www.thefederalregister.org]
[FR Doc No: 2015-04050]

=======================================================================
-----------------------------------------------------------------------

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 25

[Docket No.FAA-2015-0426; Notice No. 25-15-03-SC]

Special Conditions: Bombardier Aerospace Incorporated, Models BD-
500-1A10 and BD-500-1A11 Series Airplanes; Electronic Flight Control
System: Pitch and Roll Limiting Functions

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed special conditions.

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

SUMMARY: This action proposes special conditions for the Bombardier
Aerospace Models BD-500-1A10 and BD-500-1A11 Series Airplanes. These
airplanes will have a novel or unusual design feature associated with
the fly-by-wire electronic flight control system (EFCS) that limits
pitch- and roll-attitude functions to prevent the airplane from
attaining certain pitch attitudes and roll angles. This system
generates the actual surface commands that provide for stability
augmentation and flight control for all three-airplane axes
(longitudinal, lateral, and directional). The applicable airworthiness
regulations do not contain adequate or appropriate safety standards for
this design feature. These proposed 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: Send your comments on or before April 13, 2015.

ADDRESSES: Send comments identified by docket number FAA-2015-0426
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 the 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: Joe Jacobsen, FAA, Standardization
Branch, ANM-113 Transport Airplane Directorate, Aircraft Certification
Service, 1601 Lind Avenue SW., Renton, Washington 98057-3356; telephone
425-227-2011; facsimile 425-227-1149.

SUPPLEMENTARY INFORMATION:

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 December 10, 2009, Bombardier Aerospace applied for a type
certificate for their new Models BD-500-1A10 and BD-500-1A11 series
airplanes (hereafter collectively referred to as ``CSeries''). The
CSeries airplanes are swept-wing monoplanes with an aluminum alloy
fuselage, sized for 5-abreast seating. Passenger capacity is designated
as 110 for the Model BD-500-1A10 and 125 for the Model BD-500-1A11.
Maximum takeoff weight is 131,000 pounds for the Model BD-500-1A10 and
144,000 pounds for the Model BD-500-1A11. The CSeries airplanes will
have a fly-by-wire EFCS.

[[Page 10633]]

Type Certification Basis

Under the provisions of Title 14, Code of Federal Regulations (14
CFR) 21.17, Bombardier Aerospace must show that the CSeries airplane
meets the applicable provisions of part 25, as amended by Amendments
25-1 through 25-129.
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 Bombardier CSeries airplanes
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 or similar
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 Bombardier CSeries 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, 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(a)(2).

Novel or Unusual Design Features

The Bombardier CSeries airplane will incorporate the following
novel or unusual design feature: Fly-by-wire EFCS that will limit pitch
and roll attitude functions to prevent the airplane from attaining
certain pitch attitudes and roll angles greater than plus or minus 65
degrees, and positive spiral stability introduced for roll angles
greater than 30 degrees at speeds below VMO/MMO.
This system generates the actual surface commands that provide for
stability augmentation and flight control for all three-airplane axes
(longitudinal, lateral, and directional).

Discussion

Part 25 does not specifically relate to flight characteristics
associated with fixed attitude limits. Bombardier proposes on the
CSeries to implement pitch and roll attitude-limiting functions via the
EFCS normal mode. This will prevent the airplane from attaining certain
pitch attitudes and roll angles greater than plus or minus 65 degrees.
In addition, positive spiral stability, introduced for roll angles
greater than 30 degrees at speeds below VMO/MMO,
and spiral stability characteristics must not require excessive pilot
strength to achieve bank angles up to the bank angle limit.
These proposed 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
Bombardier CSeries airplane. Should Bombardier Aerospace apply later
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 certain novel or unusual design features
on Bombardier CSeries airplanes. It is not a rule of general
applicability.

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 Proposed Special Conditions

Accordingly, the Federal Aviation Administration (FAA) proposes the
following special conditions as part of the type certification basis
for the Bombardier CSeries airplanes.
In addition to Sec. 25.143, the following requirements apply to
the EFCS pitch and roll limiting functions:
1. The pitch limiting function must not impede normal maneuvering
for pitch angles up to the maximum required for normal maneuvering,
including a normal all-engines operating takeoff, plus a suitable
margin to allow for satisfactory speed control.
2. The pitch and roll limiting functions must not restrict or
prevent attaining pitch attitudes necessary for emergency maneuvering
or roll angles up to 65 degrees. Spiral stability, which is introduced
above 30 degrees roll angle, must not require excessive pilot strength
to achieve these roll angles. Other protections, which further limit
the roll capability under certain extreme angle-of-attack, attitude, or
high-speed conditions, are acceptable, as long as they allow at least
45 degrees of roll capability.
3. A lower limit of roll is acceptable beyond the overspeed warning
if it is possible to recover the airplane to the normal flight envelope
without undue difficulty or delay.

Issued in Renton, Washington, on February 19, 2015.
John P. Piccola, Jr.,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 2015-04050 Filed 2-26-15; 8:45 am]
BILLING CODE 4910-13-P

Federal Register / Vol. 80, No. 39 / Friday, February 27, 2015 / Proposed Rules 10633

Type Certification Basis attaining certain pitch attitudes and roll they allow at least 45 degrees of roll
Under the provisions of Title 14, Code angles greater than plus or minus 65 capability.
of Federal Regulations (14 CFR) 21.17, degrees. In addition, positive spiral 3. A lower limit of roll is acceptable
Bombardier Aerospace must show that stability, introduced for roll angles beyond the overspeed warning if it is
the CSeries airplane meets the greater than 30 degrees at speeds below possible to recover the airplane to the
applicable provisions of part 25, as VMO/MMO, and spiral stability normal flight envelope without undue
amended by Amendments 25–1 through characteristics must not require difficulty or delay.
25–129. excessive pilot strength to achieve bank Issued in Renton, Washington, on February
If the Administrator finds that the angles up to the bank angle limit. 19, 2015.
These proposed special conditions John P. Piccola, Jr.,
applicable airworthiness regulations
contain the additional safety standards
(i.e., 14 CFR part 25) do not contain Acting Manager, Transport Airplane
that the Administrator considers Directorate, Aircraft Certification Service.
adequate or appropriate safety standards
necessary to establish a level of safety
for the Bombardier CSeries airplanes [FR Doc. 2015–04050 Filed 2–26–15; 8:45 am]
equivalent to that established by the
because of a novel or unusual design BILLING CODE 4910–13–P
existing airworthiness standards.
feature, special conditions are
prescribed under the provisions of Applicability
§ 21.16. As discussed above, these special DEPARTMENT OF LABOR
Special conditions are initially conditions are applicable to the
applicable to the model for which they Bombardier CSeries airplane. Should Occupational Safety and Health
are issued. Should the type certificate Bombardier Aerospace apply later for a Administration
for that model be amended later to change to the type certificate to include
include any other model that another model incorporating the same 29 CFR Part 1926
incorporates the same or similar novel novel or unusual design feature, these [Docket No. OSHA–2015–0002]
or unusual design feature, these special special conditions would apply to that
conditions would also apply to the other model as well. Special Meeting: Advisory Committee
model under § 21.101. on Construction Safety and Health
In addition to the applicable Conclusion (ACCSH)
airworthiness regulations and special This action affects only certain novel
conditions, the Bombardier CSeries or unusual design features on AGENCY: Occupational Safety and Health
airplane must comply with the fuel vent Bombardier CSeries airplanes. It is not Administration (OSHA), Labor.
and exhaust emission requirements of a rule of general applicability. ACTION: Announcement of special
14 CFR part 34 and the noise meeting of the ACCSH.
certification requirements of 14 CFR List of Subjects in 14 CFR Part 25
part 36, and the FAA must issue a Aircraft, Aviation safety, Reporting SUMMARY: ACCSH will hold a special
finding of regulatory adequacy under and recordkeeping requirements. meeting March 31–April 1, 2015, in
§ 611 of Public Law 92–574, the ‘‘Noise The authority citation for these Washington, DC, to consider a proposed
Control Act of 1972.’’ special conditions is as follows: rule to revise OSHA’s crane operator
The FAA issues special conditions, as qualification requirement in the Cranes
Authority: 49 U.S.C. 106(g), 40113, 44701, and Derricks in Construction standard.
defined in 14 CFR 11.19, in accordance 44702, 44704.
with § 11.38, and they become part of DATES: ACCSH will meet from 9 a.m. to
the type-certification basis under The Proposed Special Conditions 5 p.m., Tuesday, March 31, 2015, and
§ 21.17(a)(2). Accordingly, the Federal Aviation from 9 a.m. to 1 p.m., Wednesday, April
Administration (FAA) proposes the 1, 2015.
Novel or Unusual Design Features Submit (postmark, send, transmit)
following special conditions as part of
The Bombardier CSeries airplane will the type certification basis for the comments, requests to address the
incorporate the following novel or Bombardier CSeries airplanes. ACCSH meeting, speaker presentations
unusual design feature: Fly-by-wire In addition to § 25.143, the following (written or electronic), and requests for
EFCS that will limit pitch and roll requirements apply to the EFCS pitch special accommodations for the ACCSH
attitude functions to prevent the and roll limiting functions: meeting by March 20, 2015.
airplane from attaining certain pitch 1. The pitch limiting function must ADDRESSES:
attitudes and roll angles greater than not impede normal maneuvering for Submission of comments, requests to
plus or minus 65 degrees, and positive pitch angles up to the maximum speak, and speaker presentations for the
spiral stability introduced for roll angles required for normal maneuvering, ACCSH meeting: Submit comments,
greater than 30 degrees at speeds below including a normal all-engines operating requests to speak, and speaker
VMO/MMO. This system generates the takeoff, plus a suitable margin to allow presentations for the ACCSH meeting,
actual surface commands that provide for satisfactory speed control. using one of the following methods:
for stability augmentation and flight 2. The pitch and roll limiting Electronically: Submit materials,
control for all three-airplane axes functions must not restrict or prevent including attachments, electronically at
(longitudinal, lateral, and directional). attaining pitch attitudes necessary for http://www.regulations.gov, which is
emergency maneuvering or roll angles the Federal eRulemaking Portal. Follow
Discussion
tkelley on DSK3SPTVN1PROD with PROPOSALS

up to 65 degrees. Spiral stability, which the on-line instructions for submissions.
Part 25 does not specifically relate to is introduced above 30 degrees roll Facsimile (Fax): If the submission,
flight characteristics associated with angle, must not require excessive pilot including attachments, does not exceed
fixed attitude limits. Bombardier strength to achieve these roll angles. 10 pages, you may fax it to the OSHA
proposes on the CSeries to implement Other protections, which further limit Docket Office at (202) 693–1648.
pitch and roll attitude-limiting the roll capability under certain extreme Regular mail, express mail, hand
functions via the EFCS normal mode. angle-of-attack, attitude, or high-speed delivery, or messenger (courier) service:
This will prevent the airplane from conditions, are acceptable, as long as Submit materials to the OSHA Docket

VerDate Sep<11>2014 16:15 Feb 26, 2015 Jkt 235001 PO 00000 Frm 00007 Fmt 4702 Sfmt 4702 E:\FR\FM\27FEP1.SGM 27FEP1

Document Created: 2015-12-18 13:14:10
Document Modified: 2015-12-18 13:14:10

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		Proposed Rules
Action		Notice of proposed special conditions.
Dates		Send your comments on or before April 13, 2015.
Contact		Joe Jacobsen, FAA, Standardization Branch, ANM-113 Transport Airplane Directorate, Aircraft Certification Service, 1601 Lind Avenue SW., Renton, Washington 98057-3356; telephone 425-227-2011; facsimile 425-227-1149.
FR Citation		80 FR 10632
CFR Associated		Aircraft; Aviation Safety and Reporting and Recordkeeping Requirements

80 FR 10632 - Special Conditions: Bombardier Aerospace Incorporated, Models BD-500-1A10 and BD-500-1A11 Series Airplanes; Electronic Flight Control System: Pitch and Roll Limiting Functions

DEPARTMENT OF TRANSPORTATIONFederal Aviation Administration

Federal Register Volume 80, Issue 39 (February 27, 2015)

DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration