EASA AD No : 2011-0070

EASA Form 110 Page 1/2 

## EASA AIRWORTHINESS DIRECTIVE

AD No.: 2011-0070

Date: 18 April 2011

Note: This Airworthiness Directive (AD) is issued b y EASA, acting in accordance with Regulation (EC) No 216/2008 on behalf of the Europe an Community, its Member States and of the European third countries that participate in the activities of EASA under Article 66 of that Regulation.
This AD is issued in accordance with EC 1702/2003, Part 21A.3B. In accordance with EC 2042/2003 Annex I, Part M.A.301, the continuing airworthiness of an aircraft shall be en sured by accomplishing any applicable ADs. Conseque ntly, no person may operate an aircraft to which an AD applies, except in accordance with the requirements of that AD unle ss otherwise specified by the Agency [EC 2042/2003 Annex I, Part M.A.303] or agre ed with the Authority of the State of Registry [EC 216/2008, Article 14(4) exemption]. 

### Type Approval Holder’s Name :

DASSAULT AVIATION Type/Model designation(s) :
FALCON 7X aeroplanes

TCDS Number: EASA.A.155

Foreign AD: Not Applicable

Supersedure: None



### ATA 35 Oxygen – Passenger Oxygen Line – Inspection / Modification

Manufacturer(s): DASSAULT AVIATION

Applicability: Falcon 7X aeroplanes with Serial Num bers 3, 10, 13, 18, 19, 20, 22, 23, 24, 26, 27, 29, 30, 31, 32, 33, 35, 36, 38, 41, 42, 43, 47, 48, 58, 63, 64, 66, 67, 68, 71, 76, 78, 79, 83, 84, 85, 86, 87 and 93, unle ss Dassault Aviation modification, as indicated in Dassault Aviation Ser vice Bulletin (SB) F7X No. 174, has been embodied.

Reason: Inspections of two aeroplanes during cabin completions have shown that a passenger oxygen line at frame 10 was chafing with the forward lavatory rear structure. Design review of the area confirmed a local low cle arance value which raises the risk of the oxygen line developing a crack. This condition, if not detected and corrected, coul d lead to rupture of the oxygen line which, in case of a cabin depressurizat ion, would impair operation of the passengers’ oxygen distribution sy stem. To address this unsafe condition, Dassault Aviation have designed a modification with a new oxygen line routing. This AD requires an inspection of the oxygen line f or interference or damage and, in case of discrepancies, accomplishment of th e modification before next flight. It requires as well accomplishment of the m odification of the oxygen line routing for the aeroplanes in which no discrep ancies were identified.EASA AD No : 2011-0070

EASA Form 110 Page 2/2 Effective Date: 02 May 2011

Required action(s) and Compliance Time(s): Required as indicated unless previously accomplishe d: (1) Within 2 months after the effective date of thi s AD, inspect the oxygen line for clearance and damage in accordance with Da ssault Aviation SB F7X No. 174. (2) If any discrepancy is found, before next flight , modify the routing of the oxygen line in accordance with the instruction of D assault Aviation SB F7X No. 174. (3) Unless already accomplished in accordance with the paragraph (2) of the required actions of this AD, within 98 months or 40 00 flight cycles after the effective date of this AD, whichever occurs fir st, modify the routing of the oxygen line in accordance with Dassault Aviatio n SB F7X No. 174.

Ref. Publications: Dassault Aviation Service Bulletin F7X No. 174 init ial issue dated 19 January 2011. The use of later approved revisions of this documen t is acceptable for compliance with the requirements of this AD.

Remarks : 1. If requested and appropriately substantiated, EA SA can approve Alternative Methods of Compliance for this AD. 2. This AD was posted on 10 March 2011 as PAD 11-03 0 for consultation until 07 April 2011. No comments were received duri ng the consultation period. 3. Enquiries regarding this AD should be referred t o the Airworthiness Directives, Safety Management & Research Section, C ertification Directorate, EASA. E-mail ADs@easa.europa.eu

. 4. For any question concerning the technical conten t of the requirements in this AD, please contact your Dassault Falcon Techni cal Assistance:

• For Europe, Middle East and Africa based operators : Hot Line: (33) 1 47 11 37 37 / Fax: (33) 1 47 11 8 9 49

• For USA, Canada and Mexico based operators: Help Desk: (1) 800-2FALCON (2325266) / Fax: (1) 20 1 541 4740

• All other areas: Help Desk: (1) 201 541 4747 / Fax: (1) 201 541 474 0