EASA AD No.: 2009-0208R1 

EASA Form 110 Page 1/2 

EASA AIRWORTHINESS DIRECTIVE 

AD No.: 2009-0208R1 

Date: 02 June 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 Airworthiness Directive applies, except in accordance with the requirements of that Airworthiness 

Directive 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 

Revision: This AD revises EASA AD 2009-0208 dated 13 October 2009 

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

Manufacturer(s): Dassault Aviation 

Applicability: All Falcon 7X aeroplanes, all serial numbers. 

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

where the failed radio-altimeter indicated a negative distance to the ground 

despite the aircraft was flying at medium or high altitude. 

A locked radio-altimeter #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. 

Investigation in order to determine the root cause of radio-altimeter lock-up is 

in progress. In the meantime, Dassault Aviation has developed an operational 

procedure that in case of radio-altimeter #1 lock-up allows the crew, by 

depowering radio-altimeter #1, to restore in flight the system warning 

performance. 

Failure to comply with this interim flight procedure may cause the crew to be 

unaware of possible system failures that could require urgent crew's actions. 

To address this unsafe condition, AD 2009-0208 was issued on 13 October 

2009. It mandated application of a new abnormal Airplane Flight Manual 

(AFM) procedure when radio-altimeter #1 lock-up occurs and prohibited 

dispatch of the aeroplane with any radio-altimeter inoperative. 
EASA AD No.: 2009-0208R1 

EASA Form 110 Page 2/2 

Since AD 2009-0208 was issued, Easy avionics load 10 has been developed 

with change M0566 or Service Bulletin (SB) Falcon 7X n°100 that brings new 

features to display a "RA miscompare" flag on both Primary Display Units 

(PDU) and accepts a commanded system reversion to the correct radioaltimeter output. 

EASA AD 2009-0208R1 is issued to allow not deactivating radio-altimeter #1 

in case lock-up conditions occur in flight for aeroplanes on which M0566 or 

SB Falcon 7X n°100 has been embodied. 

Effective Date: 

 Revision 1 : 16 June 2010 

Original issue : 27 October 2009 

Required Action(s) 

and Compliance 

Time(s): 

Required as indicated after the effective date of the original issue of this AD: 

(1) For aeroplanes on which M0566 or SB Falcon 7X n°100 has not been 

embodied, if radio-altimeter #1 lock-up conditions occur in flight, power off 

radio-altimeter #1, in accordance with the instructions of Falcon 7X AFM 

procedure 3-140-65 or 3-140-65A. 

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

embodied, if radio-altimeter #1 lock-up conditions occur in flight, revert to 

the correct radio-altimeter output, in accordance with the instructions of 

Falcon 7X AFM procedure 3-140-65B and 3-140-70A. 

(3) Dispatch of the aeroplane with any radio-altimeter inoperative is 

prohibited. 

(4) Strikethrough of item 34-10 “Radio-Altimeters (RA)” in the Minimum 

Equipment List (MEL) and inserting a copy of this AD for the 

corresponding MEL entry of each aeroplane is considered acceptable to 

comply with the requirement of paragraph (3) of this AD. 

Ref. Publications: • Falcon 7X AFM DGT105608 rev. 9 including Abnormal Procedure 

3-140-65 or 3-140-65A or 3-140-65B "radar-altimeter #1 locked" and 

Abnormal Procedure 3-140-70A. “Sensor miscompare (A/C with 

M566)”. 

• Falcon 7X MMEL DGT 106042 rev. 4. 

• Service Bulletin 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 process after publication. 

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