87 FR 72 pgs. 22116-22117 - Special Conditions: Dassault Aviation Model Falcon 6X Airplane; Flight Envelope Protection: Pitch and Roll Limiting Functions
Type: RULEVolume: 87Number: 72Pages: 22116 - 22117
Pages: 22116, 22117Docket number: [Docket No. FAA-2022-0125; Special Conditions No. 25-808-SC]
FR document: [FR Doc. 2022-07932 Filed 4-13-22; 8:45 am]
Agency: Transportation Department
Sub Agency: Federal Aviation Administration
Official PDF Version: PDF Version
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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.
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:
• Federal eRegulations Portal: Go to https://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: 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 https://www.regulations.gov/, 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 troy.a.brown@faa.gov. 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 https://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:
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 troy.a.brown@faa.gov.
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 §?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 §?21.101.
[top] 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-
The FAA issues special conditions, as defined in 14 CFR 11.19, in accordance with §?11.38, and they become part of the type certification basis under §?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 MO /M MO . At speeds greater than V MO and up to V DF , maximum aileron control force is limited to only 45 degrees maximum bank angle.
The installed attitude-limiting functions are designed such that, at V MO + 6 knots or M MO + 0.012, an automatic nose-up pitch is applied with phase advance in case of high acceleration. The speed stabilizes at V D /M D if the stick is full forward, or the speed will return to V MO /M MO 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 §?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]
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