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 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 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 ensured by accomplishing any applicable ADs. Consequently, no person may 

operate an aircraft to which an AD applies, except in accordance with the requirements of that AD unless 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 - Modification 

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 event, 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 information would lead to 

untimely inhibition of warnings that could compromise 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 sensors wiring by adding 

dedicated fuses to each WOW proximity sensor, in accordance 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 accomplished: 

Within 27 months or within the next 1 800 flight hours after the effective date 

of this AD, whichever occurs first, install dedicated fuses on WOW proximity 

sensors, in accordance with the instructions of Dassault SB F7X-065. 
EASA AD No.: 2009-0031 

EASA Form 110 Page 2/2 

Ref. Publications: Dassault Aviation Service Bulletin F7X-065, original issue. 

The use of later 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. 

2. This AD was published as PAD 09-116 on 02 October 2009 for 

consultation until 30 October 2009. No comments were received during 

the consultation period. 

3. Enquiries regarding this AD should be referred to the Airworthiness 

Directives, Safety Management & Research Section, Certification 

Directorate, EASA. E-mail: ADs@easa.europa.eu. 

4. For any question concerning the technical contents 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 / Fax: (33) 1 47 11 89 49 

• For USA, Canada and Mexico based operators: 

 Help Desk: (1) 800-2FALCON (2325266) / Fax: (1) 201 541 4740 

• All other areas: 

 Help Desk: (1) 201 541 4747 / Fax: (1) 201 541 4740