80 FR 24191 - Special Conditions: Bombardier Inc. Model BD-700-2A12 and BD-700-2A13 Airplanes; Design Roll-Maneuver Condition

DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration

Federal Register Volume 80, Issue 83 (April 30, 2015)

Page Range		24191-24193
FR Document		2015-10102

These special conditions are issued for the Bombardier Inc. Model BD-700-2A12 and BD-700-2A13 airplanes. These airplanes will have a novel or unusual design feature associated with an electronic flight- control system that provides roll control of the airplanes through pilot inputs to the flight computers. 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 80 Issue 83 (Thursday, April 30, 2015)

[Federal Register Volume 80, Number 83 (Thursday, April 30, 2015)]
[Rules and Regulations]
[Pages 24191-24193]
From the Federal Register Online [www.thefederalregister.org]
[FR Doc No: 2015-10102]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 25

[Docket No. FAA-2015-0757; Special Conditions No. 25-581-SC]

Special Conditions: Bombardier Inc. Model BD-700-2A12 and BD-700-
2A13 Airplanes; Design Roll-Maneuver Condition

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final special conditions; request for comments.

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SUMMARY: These special conditions are issued for the Bombardier Inc.
Model BD-700-2A12 and BD-700-2A13 airplanes. These airplanes will have
a novel or unusual design feature associated with an electronic flight-
control system that provides roll control of the airplanes through
pilot inputs to the flight computers. 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 Bombardier Inc. on April 30, 2015.
We must receive your comments by June 15, 2015.

ADDRESSES: Send comments identified by docket number FAA-2015-0757
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/ gov/.
Docket: Background documents or comments received may be read at

[[Page 24192]]

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: Mark Freisthler, FAA, Airframe and
Cabin Safety Branch, Transport Airplane Directorate, Aircraft
Certification Service, 1601 Lind Avenue SW., Renton, Washington 98057-
3356; telephone 425-227-1119; facsimile 425-227-1232.

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(s).
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 June 13, 2012, Bombardier Inc. applied for an amended type
certificate for their new Model BD-700-2A12 and BD-700-2A13 airplanes.
The BD-700-2A12 and BD-700-2A13 augment the existing BD-700 family of
airplanes, and are marketed as the Bombardier Global 7000 and Global
8000, respectively. These are ultra-long-range, executive-interior
business jets equipped with Rockwell Collins ProLine Fusion Integrated
Avionics System. These airplanes have a maximum certified passenger
capacity of 19.
The design of the Model BD-700-2A12 and BD-700-2A13 airplanes
includes new high-speed transonic wings with improved aerodynamic
efficiency, a pressurized cabin for luxury interiors, and they share an
identical supplier base and significant common design elements. The
current design roll-maneuver requirement in Title 14, Code of Federal
Regulations (14 CFR) part 25 is inadequate for addressing an airplane
with electronic flight controls that affect maneuvering. These special
conditions adjust the current roll-maneuver requirement, Sec. 25.349,
to take into account the effects of an electronic flight-control
system.

Type Certification Basis

Under the provisions of 14 CFR 21.101, Bombardier Inc. must show
that the Model BD-700-2A12 and BD-700-2A13 airplanes meet the
applicable provisions of part 25 as amended by Amendments 25-1 through
25-136.
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 Model BD-700-2A12 and BD-700-2A13
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 novel or
unusual design feature, or should any other model already included on
the same type certificate be modified to incorporate 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 Model BD-700-2A12 and BD-700-2A13 airplanes 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. 21.101.

Novel or Unusual Design Features

The Model BD-700-2A12 and BD-700-2A13 airplanes will incorporate
the following novel or unusual design features:
The airplanes are equipped with an electronic flight-control system
that provides control through pilot inputs to the flight computer.
Current part 25 airworthiness regulations account for control laws for
which aileron deflection is proportional to control-stick deflection.
They do not address nonlinearities or other effects on aileron
actuation that electronic flight controls may cause. Because this type
of system may affect flight loads, and therefore the structural
capability of the airplanes, special conditions are needed to address
these effects.

Discussion

These special conditions differ from current requirements in that
they require that the roll maneuver is based on defined actuation of
the cockpit roll control as opposed to defined deflections of the
aileron itself. Also, the special conditions require an additional load
condition at VA, in which the cockpit roll control is
returned to neutral following the initial roll input.
These special conditions differ from similar special conditions
applied on previous programs. These special conditions are limited to
the roll axis only, whereas previous special conditions also included
the pitch and yaw axes. Special conditions are no longer needed for the
pitch or yaw axes, because Amendment 25-91 takes into account the
effects of an electronic flight-control system in those axes (Sec.
25.331 for pitch and Sec. 25.351 for yaw).
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
Model BD-700-2A12 and BD-700-2A13 airplanes. Should Bombardier Inc.
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 certain novel or unusual design features
on Bombardier Inc. Model BD-700-2A12 and BD-700-2A13 airplanes. 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

[[Page 24193]]

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 the Bombardier Inc. Model BD-700-2A12
and BD-700-2A13 airplanes.

Design Roll Maneuver Condition

In lieu of compliance to Sec. 25.349(a):
The following conditions, speeds, and cockpit roll-control motions
(except as the motions may be limited by pilot effort) must be
considered in combination with an airplane load factor of zero and of
two-thirds of the positive maneuvering factor used in design. In
determining the resulting control-surface deflections, the torsional
flexibility of the wing must be considered in accordance with Sec.
25.301(b):
1. Bombardier Inc. must investigate conditions corresponding to
steady rolling velocities. In addition, conditions corresponding to
maximum angular acceleration must be investigated for airplanes with
engines or other weight concentrations outboard of the fuselage. For
the angular acceleration conditions, zero rolling velocity may be
assumed in the absence of a rational time-history investigation of the
maneuver.
2. At VA, sudden movement of the cockpit roll control up
to the limit is assumed. The position of the cockpit roll control must
be maintained until a steady roll rate is achieved and then must be
returned suddenly to the neutral position.
3. At VC, the cockpit roll control must be moved
suddenly and maintained so as to achieve a roll rate not less than that
obtained in Special Condition 2, above.
4. At VD, the cockpit roll control must be moved
suddenly and maintained so as to achieve a roll rate not less than one
third of that obtained in Special Condition 2, above.

Issued in Renton, Washington, on April 17, 2015.
Victor Wicklund,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 2015-10102 Filed 4-29-15; 8:45 am]
BILLING CODE 4910-13-P

Document Created: 2018-02-21 10:15:00
Document Modified: 2018-02-21 10:15:00

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 comments.
Dates		This action is effective on Bombardier Inc. on April 30, 2015. We must receive your comments by June 15, 2015.
Contact		Mark Freisthler, FAA, Airframe and Cabin Safety Branch, Transport Airplane Directorate, Aircraft Certification Service, 1601 Lind Avenue SW., Renton, Washington 98057- 3356; telephone 425-227-1119; facsimile 425-227-1232.
FR Citation		80 FR 24191
CFR Associated		Aircraft; Aviation Safety and Reporting and Recordkeeping Requirements

80 FR 24191 - Special Conditions: Bombardier Inc. Model BD-700-2A12 and BD-700-2A13 Airplanes; Design Roll-Maneuver Condition

DEPARTMENT OF TRANSPORTATIONFederal Aviation Administration

Federal Register Volume 80, Issue 83 (April 30, 2015)

DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration