EASA AD No.: 2009-0208R2 

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EASA AIRWORTHINESS DIRECTIVE 

AD No.: 2009-0208R2 

Date: 22 May 2012 

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]. 

Design Approval Holder’s Name : 

DASSAULT AVIATION 

Type/Model designation(s) : 

FALCON 7X aeroplanes 

TCDS Number : EASA.A.155 

Foreign AD : Not applicable 

Revision: This AD revises EASA AD 2009-0208R1 dated 02 June 2010. 

ATA 34 Navigation – Radio-altimeter Lock-up – Operational Procedure 

Manufacturer(s): Dassault Aviation 

Applicability: Falcon 7X aeroplanes, all serial numbers. 

Reason: Several occurrences of untimely radio-altimeter lock-up have been reported, 

where the failed radio-altimeter (RA) indicated a negative distance to the 

ground despite the aircraft was flying at medium or high altitude. 

A locked RA #1 leads to untimely inhibition of warnings that could be 

displayed along with certain abnormal conditions while the avionic system 

switches into landing mode during altitude cruise. 

This condition, if not corrected, may cause the flight crew to be unaware of 

possible system failures that could require immediate actions, which could 

ultimately lead to loss of control of the aeroplane. 

To address this unsafe condition, Dassault Aviation developed an Airplane 

Flight Manual (AFM) operational procedure that, in case of RA #1 lock-up, 

allows the crew to restore the system warning performance by depowering the 

RA #1. EASA issued AD 2009-0208 to require application of that new 

abnormal procedure when RA #1 lock-up occurs. That EASA AD also 

prohibited dispatch of the aeroplane with any radio-altimeter inoperative. 

Since issuance of EASA AD 2009-0208, Dassault Aviation developed Easy 

avionics load 10 which is embodied through Dassault Aviation production 

modification M0566 or in-service through Service Bulletin (SB) Falcon 7X 

n°100. This modification provides new features to d isplay a "RA miscompare" 

flag on both Primary Display Units (PDU) and allows a commanded system 
EASA AD No.: 2009-0208R2 

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reversion to the correct RA output. 

Prompted by this modification, EASA issued AD 2009-0208R1, to allow not 

deactivating RA #1 in case lock-up conditions occurred in flight, for aeroplanes 

on which M0566 or SB Falcon 7X n°100 was embodied. 

Since issuance of EASA AD 2009-0208R1, further analysis shows that, for 

aeroplanes with M0566 applied in production, or SB Falcon 7X N°100 applied 

in service, the RA#2 lock-up occurrence should be addressed through a 

commanded system reversion, now only contained in a simplified Falcon 7X 

AFM procedure 3-140-70A. 

For the reasons described above, this AD revises EASA AD 2009-0208R1 to 

reduce the requirement to amend the AFM by deleting the reference to 

procedure 3-140-65B. In addition, Dassault Aviation have confirmed that all 

Falcon 7X have been or are being modified with Mod M0566 applied in 

production, or SB Falcon 7X n°100 applied in servic e. For this reason, 

paragraph (1) of this AD has been deleted. Finally, many editorial changes 

have been made to align the writing of the AD with the current writing 

standards. 

Effective Date: Revision 2: 05 June 2012 

Revision 1: 16 June 2010 

Original issue: 27 October 2009 

Required Action(s) 

and Compliance 

Time(s): 

Required as indicated, unless accomplished previously: 

(1) Deleted. See Reason paragraph of this AD. 

(2) For aeroplanes on which M0566 or SB Falcon 7X n°100 has been 

embodied, from 16 June 2010 [the effective date of Revision 1 of this AD], 

amend the AFM to incorporate Falcon 7X AFM procedure 3-140-70A, or 

as an alternative, amend the AFM to incorporate Dassault Aviation CP054 

(which includes Falcon 7X AFM procedure 3-140-70A) and operate the 

aeroplane accordingly. 

The use of Dassault AFM DGT 105608 revision 15, which includes 

Dassault Aviation Falcon 7X AFM procedure 3-140-70A, is acceptable to 

comply with the requirements of paragraph (2) of this AD. 

(3) From 27 October 2009 [the effective date of the original issue of this AD], 

dispatch of the aeroplane with any radio-altimeter inoperative is 

prohibited. 

(4) From 27 October 2009 [the effective date of the original issue of this AD], 

delete item 34-10 “Radio-Altimeters (RA)” from the operator’s Minimum 

Equipment List (MEL). 

Inserting a copy of this AD into that MEL for each affected aeroplane is 

acceptable to comply with the requirements of paragraphs (3) and (4) of 

this AD. 

Ref. Publications: Dassault Aviation Falcon 7X AFM revision 15 DGT105608. This revision 

includes Dassault Aviation Falcon 7X AFM procedure 3-140-70A. 

Dassault Aviation Falcon 7X MMEL DGT 106042 revision 6. 

Dassault Aviation SB Falcon 7X n°100 original issue . 

The use of later approved revisions of these documents 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. The required actions and the risk allowance have granted the issuance of 

a Final AD with Request for Comments, postponing the public consultation 
EASA AD No.: 2009-0208R2 

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process after publication. 

3. Enquiries regarding this AD should be referred to the Safety Information 

Section, Executive 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.