E ASA AD No.: 20 15

- 0 204

TE. CAP.0011 0

- 00 4 © European Aviation Safety Agency. All rights reserved. 1 / 2 Proprietary document. Copies are not controlled. Confirm revision status through the EASA

- Internet/Intranet

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## EASA AIRWORTHINESS DIRECTIVE

AD No .: 20 1 5

- 0 204

Date : 08 October 2015

Note: This Airworthiness Directive (AD) is issued by EASA, acting in accordance with Regulation (EC) No 216/2008 on behalf of the European Community, its Member States and of the European third countries that participate in the activities of EASA unde r Article 66 of that Regulation

.

This AD is issued in accordance with EU 748/2012, Part 21.A.3B. In accordan ce with EU 1321/2014 Annex I, Part M.A.301, the continuing airworthiness of an aircraft shall be ensured by accomplishing any applicable ADs. Consequently, no person may ope rate an aircraft to which an AD applies, except in accordance with the requirements of that AD, unless otherwise specified by the Agency [EU 1321/2014 Annex I, Part M.A.303] or agreed with the Authority of the State of Registry [EC 216/2008, Article 14(4) exempt ion]

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### Design Approval Holder’s Name:

D ASSAULT A VIATION Type/Model designation(s):

F a lcon 7X aeroplanes

TCDS Number : EASA.A. 155

F oreign AD : Not a pplicable

Supersedure : None



### ATA 53 Fuselage

– Lateral Engine Pylon s

– Stiffener Attachments to Pylon

Spar 41 Assembly

– Inspection / Repair

Manufacturer(s): D assault Aviation

Applicability: Falcon 7X aeroplanes serial numbers (S/N) 1 to 221 inclusive, except S/N 182 and S/N 220

.

Reason: On the assembly line o f Falcon 7X aeroplanes, defects were detected on left
hand and right hand engine pylons. A quality review revealed that bores
located on upper and lower stiffener joints to the web at pylon Frame 41 were improperly drilled. Fettlings of borings, for fixing diameter 4 mm and 5 mm,

we re found ovalized, too deep and hav ing irregular surface qualit ies under the head of fixing. Dassault Aviation identified the individual aeroplanes that are potentially affected by this production deficiency

. This condition, if not detected and corrected, would adversely affect the structural integrity of the aeroplane

. To address this potential unsafe condition Dassault Aviation published Serv ice
Bulletin (SB) 7X

- 346 to provide corrective action instructions.

For the reasons described above, this AD requires a one

- time inspect ion and

, depending on findings, repair of affected stiffener bores

.

Effective Date: 22 October 2015E ASA AD No.: 20 15

- 0 204

TE. CAP.0011 0

- 00 4 © European Aviation Safety Agency. All rights reserved. 2 / 2 Proprietary document. Copies are not controlled. Confirm revision status through the EASA

- Internet/Intranet

. Required A ction(s) and Compliance Time(s): Required as indicated, unless accomplished previously :
Before exceeding 4 000 f light c ycles or 9 8 months, whichever occurs first
since date of first delivery of the aeroplane

, inspect and , depending on findings, repair bores on stiffeners at engine pylons frame 41, in accordance with the accomplishment instructions of Dassault Aviation SB 7X

- 346.

Ref. Publications: Dassaul t Aviation SB 7X

- 3 4 6 original issue date d 24 April 2015

. The use of l ater approved revisions of this document is acceptable for compliance with the requirements of this AD.

Remarks : 1. If requested and appropriately substantiated, EASA can approve
Alternative Methods of Compliance for this AD

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2. This AD was posted on 01 September 2015 as PAD 15

- 11 3 for
consultation until 2 9 September 2015. The Comment Response Document
can be found at http://ad.easa.europa.eu

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3. Enquiries regarding this A D should be referred to the Safety Information Section

, Certification Directorate, EASA. E

- mail ADs@easa.europa.eu

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4. For any question concerning the technical content of the requirements in this AD, please contact your Dassault Falcon Technical Assistance:

 For Europe, Middle East and Africa based operators:

Hot Line: (33) 1 47 11 37 37

 For USA, Canada and Mexico based operators:

Help De sk: (1) 800

- 2FALCON (2325266)

 All other areas :
Help Desk: (1) 201 541 4747