Rule2022-07932
Special Conditions: Dassault Aviation Model Falcon 6X Airplane; Flight Envelope Protection: Pitch and Roll Limiting Functions
Primary source
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Published
April 14, 2022
Effective
April 14, 2022
Issuing agencies
Transportation DepartmentFederal Aviation Administration
Abstract
These special conditions are issued for the Dassault Aviation (Dassault) Model Falcon 6X 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 an Electronic Flight Control System (EFCS) that limits pitch and roll functions to prevent the airplane from attaining certain pitch attitudes and roll angles. 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.
Full Text
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<title>Federal Register, Volume 87 Issue 72 (Thursday, April 14, 2022)</title>
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[Federal Register Volume 87, Number 72 (Thursday, April 14, 2022)]
[Rules and Regulations]
[Pages 22116-22117]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2022-07932]
[[Page 22116]]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 25
[Docket No. FAA-2022-0125; Special Conditions No. 25-808-SC]
Special Conditions: Dassault Aviation Model Falcon 6X Airplane;
Flight Envelope Protection: Pitch and Roll Limiting Functions
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 Dassault Aviation
(Dassault) Model Falcon 6X 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 an Electronic Flight Control System
(EFCS) that limits pitch and roll functions to prevent the airplane
from attaining certain pitch attitudes and roll angles. 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 Dassault on April 14, 2022. Send
comments on or before May 31, 2022.
ADDRESSES: Send comments identified by Docket No. FAA-2022-0125 using
any of the following methods:
<bullet> Federal eRegulations Portal: Go to <a href="https://www.regulations.gov/">https://www.regulations.gov/</a> and follow the online instructions for sending
your comments electronically.
<bullet> 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.
<bullet> 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.
<bullet> Fax: Fax comments to Docket Operations at 202-493-2251.
Privacy: Except for Confidential Business Information (CBI) as
described in the following paragraph, and other information as
described in title 14, Code of Federal Regulations (14 CFR) 11.35, the
FAA will post all comments received without change to <a href="https://www.regulations.gov/">https://www.regulations.gov/</a>, including any personal information you provide.
The FAA will also post a report summarizing each substantive verbal
contact received about these special conditions.
Confidential Business Information: Confidential Business
Information (CBI) is commercial or financial information that is both
customarily and actually treated as private by its owner. Under the
Freedom of Information Act (FOIA) (5 U.S.C. 552), CBI is exempt from
public disclosure. If your comments responsive to these special
conditions contain commercial or financial information that is
customarily treated as private, that you actually treat as private, and
that is relevant or responsive to these special conditions, it is
important that you clearly designate the submitted comments as CBI.
Please mark each page of your submission containing CBI as ``PROPIN.''
The FAA will treat such marked submissions as confidential under the
FOIA, and the indicated comments will not be placed in the public
docket of these special conditions. Send submissions containing CBI to
Troy Brown, Performance and Environment Section, AIR-625, Technical
Innovation Policy Branch, Policy and Innovation Division, Aircraft
Certification Service, Federal Aviation Administration, 1801 S Airport
Rd., Wichita, KS 67209-2190; telephone and fax 405-666-1050; email
<a href="/cdn-cgi/l/email-protection#84f0f6ebfdaae5aae6f6ebf3eac4e2e5e5aae3ebf2"><span class="__cf_email__" data-cfemail="4d393f2234632c632f3f223a230d2b2c2c632a223b">[email protected]</span></a>. Comments the FAA receives, which are not
specifically designated as CBI, will be placed in the public docket for
these special conditions.
Docket: Background documents or comments received may be read at
<a href="https://www.regulations.gov/">https://www.regulations.gov/</a> 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: Troy Brown, Performance and
Environment Section, AIR-625, Technical Innovation Policy Branch,
Policy and Innovation Division, Aircraft Certification Service, Federal
Aviation Administration, 1801 S Airport Rd., Wichita, KS 67209-2190;
telephone and fax 405-666-1050; email <a href="/cdn-cgi/l/email-protection#fb8f899482d59ad59989948c95bb9d9a9ad59c948d"><span class="__cf_email__" data-cfemail="83f7f1ecfaade2ade1f1ecf4edc3e5e2e2ade4ecf5">[email protected]</span></a>.
SUPPLEMENTARY INFORMATION: The substance of these special conditions
has been published in the Federal Register for public comment in
several prior instances with no substantive comments received.
Therefore, the FAA finds, pursuant to 14 CFR 11.38(b), that new
comments are unlikely, and notice and comment prior to this publication
are unnecessary.
Comments Invited
The FAA invites 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.
The FAA will consider all comments received by the closing date for
comments. The FAA may change these special conditions based on the
comments received.
Background
On July 1, 2012, Dassault Aviation applied for a type certificate
for its new Model Falcon 5X airplane. However, Dassault has decided not
to release an airplane under the model designation Falcon 5X, instead
choosing to change that model designation to Falcon 6X.
In February of 2018, due to engine supplier issues, Dassault
extended the type certificate application date for its Model Falcon 5X
airplane under new Model Falcon 6X. This airplane is a twin-engine
business jet with seating for 19 passengers, and has a maximum takeoff
weight of 77,460 pounds.
Type Certification Basis
Under the provisions of 14 CFR 21.17, Dassault must show that the
Model Falcon 6X airplane meets the applicable provisions of 14 CFR part
25, as amended by amendments 25-1 through 25-146.
If the Administrator finds that the applicable airworthiness
regulations (e.g., 14 CFR part 25) do not contain adequate or
appropriate safety standards for the Dassault Model Falcon 6X 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 Dassault Model Falcon 6X airplane must comply with the
fuel-vent and exhaust-emission requirements of 14 CFR part 34, and the
noise-
[[Page 22117]]
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 Dassault Aviation Model Falcon 6X airplane will incorporate the
following novel or unusual design features:
An Electronic Flight Control System (EFCS) that limits pitch and
roll functions to prevent the airplane from attaining certain pitch
attitudes and roll angles.
Discussion
Part 25 of 14 CFR does not specifically relate to flight
characteristics associated with fixed-attitude limits. The Dassault
Aviation Model Falcon 6X airplane will incorporate pitch and roll
attitude-limiting functions, via the Electronic Flight Control System
(EFCS) normal modes, to prevent airplane pitch attitudes greater than
+30 degrees and less than -15 degrees, and roll angles greater than
plus or minus 67 degrees. In addition, positive spiral stability is
introduced for roll angles greater than 35 degrees at speeds below
V<INF>MO</INF>/M<INF>MO</INF>. At speeds greater than V<INF>MO</INF>
and up to V<INF>DF</INF>, maximum aileron control force is limited to
only 45 degrees maximum bank angle.
The installed attitude-limiting functions are designed such that,
at V<INF>MO</INF> + 6 knots or M<INF>MO</INF> + 0.012, an automatic
nose-up pitch is applied with phase advance in case of high
acceleration. The speed stabilizes at V<INF>D</INF>/M<INF>D</INF> if
the stick is full forward, or the speed will return to V<INF>MO</INF>/
M<INF>MO</INF> if the stick is released.
The basic envelope-protection requirement, historically applied, is
to not unduly limit the maneuver capability of the airplane, nor
interfere with its ability to perform maneuvers required for normal and
emergency operations. The design details for the Dassault Model Falcon
6X support the objective of not unduly limiting the maneuver
capability, while also protecting the airplane from adverse attitudes.
These special conditions are in addition to the requirements of 14
CFR 25.143. 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
Dassault Model Falcon 6X airplane. Should Dassault 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.
List of Subjects in 14 CFR Part 25
Aircraft, Aviation safety, Reporting and recordkeeping
requirements.
Authority Citation
The authority citation for these special conditions is as follows:
Authority: 49 U.S.C. 106(f), 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 Dassault Aviation Model Falcon 6X
airplanes.
In addition to Sec. 25.143, the following requirements apply:
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 66 degrees with flaps up, or 60 degrees with flaps
down. Spiral stability, which is introduced above 35 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, if they allow at least 45 degrees of roll
capability.
Issued in Kansas City, Missouri, on April 8, 2022.
Patrick R. Mullen,
Manager, Technical Innovation Policy Branch, Policy and Innovation
Division, Aircraft Certification Service.
[FR Doc. 2022-07932 Filed 4-13-22; 8:45 am]
BILLING CODE 4910-13-P
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</html>Indexed from Federal Register on April 14, 2022.
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