DGT-DTC/F5X 372621 1/4

This document is the intellectual property of DASSAULT AVIATION. It may not be used, reproduced, modified or disclosed without its authorization. DASSAULT AVIATION Proprietary Data. DIRECTION GÉNÉRALE TECHNIQUE Saint-Cloud, January 20 t h , 2015

DGT-DTC/F5X 372621 MA/CM

TO : Federal Docket Management System www.regulations.gov (transmitted electronically)

P lease contact : Matthieu AMBERG Phone: +33 (0)1 47 11 32 52



### SUBJECT : Falcon 5X – Exem ption to FAR25.1447c1 for hi g h airfield ox yg en presentation threshold – Official Petition

Name and Address of the Petition er [as per 14 CFR Part 11, §11.81(a)]

Matthieu Amberg, Certification Manager DASSAULT AVIATION 78, quai Marcel Dassault - Cedex 300 92552 Saint-Cloud Cedex - France Phone: +33 1 47 11 32 52 E-Mail: matthieu.amberg@dassault-aviation.com



### Specific section of 14 CFR from which an exemption is required [as per 14 CFR Part 11, §11.81(b)]

Section 25.1447(c)(1), Amendm ent 25-116: “There must be an oxygen dispensing unit connected to oxygen supply terminals immediatel y available to each occupant, wherever seated, and at least two oxygen dispensing units connected to oxygen terminals in each lavatory. The total number of dispensing units an d outlets in the cabin must exceed the number of seats by at least 10 percent. The extra units must be as uniformly distributed throughout the cabin as practicable. If certification for opera tion above 30,000 feet is requested, the dispensing units providing the required oxygen flow must be automatically presented to the occupants before the cabin pressure altitude exceeds 15 ,000 feet. The crew must be provided with a manual means of making the disp ensing units immediately available in the event of failure of the automatic system”.0900400080870896 - RELEASED - Certification RepositoryDGT-DTC/F5X 372621 2/4

This document is the intellectual property of DASSAULT AVIATION. It may not be used, reproduced, modified or disclosed without its authorization. DASSAULT AVIATION Proprietary Data. 

### Extent of Relief and Reas on for Seeking Relief [as per 14 CFR Part 11, §11.81(c)]

At the present time, no less than 4 civilian airports have Landing Field Elevation (LFE) higher than 14,000 feet in China, with for instance the highest one, Daocheng Yading Airport which LFE reaches 14,472 feet above sea level (bar ometric pressure variations excluded).

In order to have Falcon 5X airc raft operable from and to these airports, Dassault Aviation seeks a relief from part of the here above section requiri ng the passenger oxygen dispensing units to be automatically presented to occupants before the cabin pressure altitude exceeds 15,000 feet.

The Falcon 5X oxygen system design includes a “High Airfield mode” for operations to and from airfields with altitudes up to 15,000 f eet, for which the threshold for automatic passengers’ masks deployment is potentially higher than 15,000 feet, in order to accommodate adequate margins with regard to standard atmospheric conditions. In “High Airfield mode”, the deployment threshold of the passenger oxygen mask s is automatically se t at 15,500 feet (+/- 500 ft) instead of 14,500 f eet (+/- 500 feet).

On Falcon 5X, the oxygen system controller is able to change the deployme nt altitude threshold when high airfield operation is required. In normal mode (high ai rfield mode deactivated), the threshold is set to 14,500 feet (+ /- 500 feet). When the High Ai rfield mode is activated , the threshold is set to 15,500 feet (+ /- 500 feet); this mode is compatible with LFE up to 15,000 feet.

The High Airfield Mode is automatically activated any time the cabin pressure can reach values above the 14,000 feet equivalent pressu re, except in decompression cases.

 On ground, this mode is activated if the Ca bin pressure altitude is above 14,000 feet.

 In flight, the High airfield mode is activated if the barometric corrected landing/take-off airport LFE is equal or above 14,000 feet, and if the cabin pressure al titude is above 12,000 feet and if the aircraft altitude is below 25,000 feet. The oxygen system deployment threshold is rese t to normal mode whenever one of these conditions is not met anymore.



### Reasons why granting your request would be in the public interest [as per 14 CFR Part 11, §11.81(d)]

Whereas Dassault Aviation is not an American aircraft manufacturer, its completion center Dassault Falcon Jet (DFJ) is a large American faci lity settled for a long time within the United States aircraft industry. In a ddition, as for all Dassault Aviati on Falcon aircraft programs, the Falcon 5X program involves numerous US Compan ies as aircraft systems and airframe and services suppliers. Falcon 5X business will increase the already established Falcon business which represents thousands of jobs over the United States.

Denial of this petition would negatively impact the ability of the Falcon 5X to compete with other airplanes in the executive ma rket, that have been already been granted with exactly theDGT-DTC/F5X 372621 3/4

This document is the intellectual property of DASSAULT AVIATION. It may not be used, reproduced, modified or disclosed without its authorization. DASSAULT AVIATION Proprietary Data. same exemption. This will adversely impact th e economy and employment of French and US companies, which would be against the public interest.



### Reasons why granting the exemption would not adversely affect safety [as per 14 CFR Part 11, §11.81(e)]

This exemption would enable to provide the re quired automatic oxygen protection to the falcon 5X passengers flying from and to high elevation airports with LFE above 14,000 feet and then maintain the level of safety intended by the rule. This “High Airfield mode” of the passenger oxygen masks deployment threshold will reduce the occurrence of ina dvertent deployment.



### Petition summary for Federal Register publication [as per 14 CFR Part 11, §11.81(f)]

In accordance with Title 14 CFR Part 11, Dassau lt Aviation respectfully submits the present petition for exemption from Title 14 CFR Pa rt 25, section §25.1447(c)(1). If granted, the present exemption, would permit relief from the requirement to automatically present passenger oxygen dispensing units to occupants before the cab in pressure altitude exceeds 15,000 feet for the Dassault Aviation Falcon 5X aircraft.

Note: the present petition is similar to previously grante d exemptions to § 25.1447(c)(1).



### Additional information, views or arguments available to support your request [as per 14 CFR Part 11, §11.81(g)]

In the scope of this petition, DASSAULT AVIATION takes benefit from previous grant of exemptions issued by FAA dealing with the se tting of oxygen mask deployment setpoint above 15,000 ft for high airfield operations. Please not e that FAA has previ ously granted such exemptions to several models with much larger passenger capacity than the DASSAULT Falcon 5X Series.

Exempt. No Issue Date Expir. Date FAA Office Disp. Regulation Petitioner Aircraft

6076 04/26/1995 (NoExpire) (NA) Granted 25.841(a) 25.1447(c)(1) The Boeing Company B757

6994 09/16/1999 (NoExpire) (NA) Partially Granted 25.1447(c)(1) Airbus Industrie A319, A320, A321 8668 12/02/2005 (NoExpire) (NA) Granted 25.1447(c)(1) The Boeing Company B737

9801 12/12/2008 (NoExpire) (NA) Granted 25.1447(c)(1) The Boeing Company B787

10044 04/01/2010 (NoExpire) (NA) Granted 25.1447(c)(1) Gulfstream Aerospace Corporation GIV-X GV-SPDGT-DTC/F5X 372621 4/4

This document is the intellectual property of DASSAULT AVIATION. It may not be used, reproduced, modified or disclosed without its authorization. DASSAULT AVIATION Proprietary Data. 

### Request for waiver from publication and comments [as per 14 CFR 11.87]

Considering the above listed exemptions, it is Dassault Aviation opini on that the requested exemption is identical to exemptions granted pr eviously and that granting this petition would not set a precedent. As a result Dassault Avia tion respectfully requests that action on this petition should not be delayed by pu blication and comment procedures.



### Operation Outside of the United States [as per 14 CFR Part 11, §11.81(h)]

Falcon 5X aircraft will be opera ted all other the world by its US registered operators, therefore Dassault Aviation requests to exercise the privileges of the exemption outside the United States.



### Conclusion

Considering the proposed oxygen system design , Da ssault Aviation believes that granting this exemption petition will be in the public interest and will not adversely a ffect safety of Falcon 5X passengers.

Respectfully Submitted.

M. AMBERG J-L. CHAUVERGNE

Evidence of signature is provided by a red electronic stamp on the first page left hand margin.