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DIRECTION GENERALE TECHNIQUE 

DGT-DTC/CER 584710 

MJM/CF 

Merignac, May 2"d, 2013 

U.S. Department of Transportation 

Docket Operations 

West Building Ground Floor, Room W12-140, 

1200 New Jersey Avenue, SE. 

Washington, DC 20590 

USA 

Please contact Jean-Marc MICHELET Tel: +33 (0) 556 139 515 Fax: +33 (0) 556 139 187 

SUBJECT: Falcon 900EX Series- Request for exemption regarding 14 CFR Part 25.629 

and 25.671 applicable to F900EX with M5281 winglet installation design 

Dear Administrator, 

In accordance with 14 CFR Part 11, we respectfully request that you consider the Petition for 

Exemption, document reference DGT361708 dated May 2"d, 2013, here attached to this letter. 

Please feel free to contact us at the following address: 

Jean-Marc MICHELET 

DASSAULT AVIATION 

Certification Directorate 

54, avenue Marcel Dassault 

33701 MERIGNAC Cedex- France 

Phone I fax: +33 (0)5 56 13 95 15 

e-mail: Jean-Marc.Michelet@dassault-aviation.com 

Thank you for your assistance. 

Yours faithfully. 

F.CHIRON J.P. DARGENTOLLE 

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

Att: DGT361708- Falcon 900EX Series- Request for exemption regarding 14 CFR Part 25.629 and 25.671 applicable to 

F900EX with M5281 Winglet installation change 

DGT-DTC/CER 584710 113 

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. 
.{.J 

A DASSAULT 

<';!1A VIA T/ON 

SUBJECT: Falcon 900EX Series- Request for exemption regarding 14 CFR Part 25.629 

and 25.671 applicable to F900EX with M5281 winglet installation design 

EXTERNAL COPIE(S) : 

M 

Ms 

T. RODRIGUEZ 

C.DARTOIS 

DGT-DTC/CER 584710 

FAA 

EASA 

Renton 

Cologne 

(P.J) 

(P.J) 

2/3 

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. 
SUBJECT: Falcon 900EX Series- Request for exemption regarding 14 CFR Part 25.629 

and 25.671 applicable to F900EX with M5281 winglet installation design 

INTERNAL COPIE(S) : 

MM. M.LAVANANT DGT/DIRM Merignac 

J.P. DARGENTOLLE DGT/DTC-DIR St-Cloud 

G. GARROUSTE DGT/DTC-DIR Merignac 

C. GIRAUDEAU DGT/DTC-SDV Merignac 

P.GEORGES DGT/DTC-RSN St Cloud 

F. BALTZINGER DGT/DTC-CER St Cloud 

Th. BOISSON DGT/DTC-CER Merignac 

F. CHIRON DGT/DTC-CER Merignac 

X. CHAUDEURGE DGT/DTC-CER Merignac 

JMMICHELET DGT/DTC-CER Merignac 

M.AGUADO DGT/DTC-EPROG Merignac 

JC BOSC DGT/DTC-EPROG Merignac 

B. LAFOSSE DGT/DTAS Merignac 

P.RENARD DGT/DTAS Merignac 

M.CHADUC DGT/DTAS Merignac 

E. GARRIGUES DGT/DTAS St Cloud 

JP JULIAN DGT/DTS Merignac 

JC GINESTE DGT/DTS Merignac 

Classement DGT St Cloud 

DGT-DTC/CER 584710 3/3 

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

Merignac, May 2nd, 2013 

DGT361708 

MJM/CF 

Please contact Jean-Marc MICHELET- Tel: +33(0)556 139 515- Fax: +33(0)556 139 187 

SUBJECT: Falcon 900EX Series- Request for exemption regarding 14 CFR Part 

25.629 and 25.671 applicable to F900EX with M5281 Winglet installation 

change 

1. Summary of the Request for exemption [as per FAR Part 

11.81 (b) and (f)] 

DASSAULT AVIATION is petitioning for an exemption for §FAR52.629 and §FAR26.671 

regarding flutter condition. 

This exemption is requested for Falcon F900EX series airplanes equipped with winglets fitted 

in Production Line through F900-M5281 Change, i.e. F900LX A/C. 

DASSAUL T AVIATION believes that allowing the exemption is satisfactory regarding 

safety aspects and that a more complex wing for F900LX could only increase the price and 

decreases the dispatch rate of the plane. 

This request for exemption also aims at being consistent with the Certification Basis used by 

Aviation Partners, Inc API STC STC02188SE, applicable to Falcon 900 Series modified per 

API, and relative to the installation of the same winglets. 

2. Background [as per Part 11.81(d)] 

DASSAULT AVIATION F900EX-M5281 design change approved in June 2010 by EASA 

and FAA (F900LX designation), is noted in EASA Type Certificate (TCDS EASA.A.062) 

and FAA Type Certificate (TCDS A46EU). 

In TCDS A46EU, for Falcon 900EX airplanes incorporating Dassault modification M5281 

(F900LX), requirement 25.629 is at amendment 119 and 25.671 is at amendment 98 . 

API STC No.ST02188SE was approved in September 2011 by FAA and EASA against 

FAR25.629 Amdt45. 

1/3 
·-

FAA raised a question in July 2011 regarding differences between certification basis recorded 

for F900EX M5281 and the one recorded for API STC. 

FAA question was addressed by DASSAULT AVIATION bringing to the following results: 

• No unsafe condition on the F900LX regarding the flutter protection, has been 

substantiated through DGT361280 dated Feb, 25, 2013, against requirements FAR 

25.629 amdt45 and FAR25.671 amdt 56 original F900 certification basis. 

• Compliance with FAR25.629 Amdt45 has been shown in particular, freedom from 

flutter in normal conditions up to 1.2Vo has been demonstrated. 

3. Public Interest [as per Part 11.81(c) & (d)] 

DASSAULT AVIATION believes that allowing the exemption is in the public's best interest 

since the situation is satisfactory regarding safety aspects and that a more complex design for 

F900LX wing could only increase the price and decreases the dispatch rate of the airplane. 

The Falcon 900LX wing design is similar (except for the winglets) to the F50/F900 one, with 

no in service flutter reporting. 

4. Reasons why granting the exemption will not adversely 

affect safety [as Part 11.81 (e)] 

Considering that M5281 change introduces no change to the hydraulic systems nor flight 

controls in comparison with F900EX certification, DASSAUL T AVIATION position is to 

show compliance with FAR25.629 Amdt45 and FAR25.671 Amdt56, which allows using 

probabilities in the substantiation ofhydraulic system failure conditions. 

DASSAULT AVIATION position is that: 

• DASSAULT AVIATION hydraulic system analysis shows dual hydraulic failure with 

total loss of fluid, with resulting loss of control system stiffuess and damping to 

prevent flutter, to be extremely improbable. 

• DASSAULT AVIATION flutter analysis (at FAA disposal upon request) shows the 

F900LX M5281 to be free from flutter divergence throughout the VDIMD domain 

considering that all combinations of failures not shown to be numerically extremely 

improbable. 

• This provides the same level of safety as the baseline aircraft before addition of 

winglets, using updated failure scenarios and parametric studies. 

• Additional DASSAULT AVIATION flutter analysis (at FAA disposal upon request) 

shows the flight domain is free from flutter in normal conditions up to 1.2VD/M=l. 

2/3 
5. Additional information [as Part 11.81(g)] 

DASSAULT AVIATION claims this exemption and wish to receive a positive attention, 

based on the fact that this request for exemption could be considered with the same level of 

treatment as API exemption No.l0347 (granted by FAA on August, 31st, 2011). 

6. Operation outside US [as per FAR Part 11.81(h)] 

Considering the multitude of countries in which Falcon 900LX series are sold and already 

operated, it is very likely that this exemption should be recognized by other countries usually 

agreeing with FAA position. 

Based on the information provided above, we kindly request an official FAA position 

regarding our petition for this exemption. 

Should you have any further comments or need further clarifications, feel free to contact us. 

Best regards, 

Falcon Certification Manager Senior Falcon Certification Manager 

3/3