EASA AD No.: 2009-0031

EASA Form 110 Page 1/2 

## EASA AIRWORTHINESS DIRECTIVE

AD No.: 2010-0031

Date: 03 March 2010

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 agreed 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 32 Landing gear - Weight-On-Wheels System - Mod ification

Manufacturer(s): Dassault Aviation

Applicability: All Falcon 7X aeroplanes, all serial numbers, except those on which modification M1031 has been implemented.
Reason: Following investigation of an in service ev ent, it has been determined that in case a short circuit occurs on a weight-on-wheels ( WOW) proximity sensor wiring, both circuit breakers that supply power to that wiring will trip, causing simultaneous de-power of all WOW proximity sensors of that part of the system. The loss of the corresponding WOW informati on would lead to untimely inhibition of warnings that could compromi se the pilot capacity to react to abnormal or failure landing conditions. This AD requires the modification of the WOW System to improve its robustness against short circuit of the proximity s ensors wiring by adding dedicated fuses to each WOW proximity sensor, in ac cordance with Dassault Aviation Service Bulletin (SB) F7X-065.

Effective Date: 17 March 2010

Required Action(s) and Compliance Time(s): Required as indicated, unless previously accomplish ed: Within 27 months or within the next 1 800 flight ho urs after the effective date of this AD, whichever occurs first, install dedicat ed fuses on WOW proximity sensors, in accordance with the instructions of Das sault SB F7X-065.EASA AD No.: 2009-0031

EASA Form 110 Page 2/2 Ref. Publications: Dassault Aviation Service Bullet in F7X-065, original issue. 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 published as PAD 09-116 on 02 Octobe r 2009 for consultation until 30 October 2009. No comments wer e received during 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 ts 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