EASA AD No.: 2011-0025-E 

EASA Form 111 Page 1/2

EASA EMERGENCY AIRWORTHINESS DIRECTIVE 

AD No.: 2011-0025-E 

Date: 18 February 2011 

Note: This Emergency 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) :

Mystère-Falcon 50 aeroplanes 

TCDS Number : EASA.A.062 

Foreign AD : Not applicable 

Supersedure : None 

ATA 26 Fire Protection - Extinguishing system – Inspection / ReInstallation 

Manufacturer(s): Dassault Aviation 

Applicability: Mystère Falcon 50 and 50EX aeroplanes, all serial numbers 

Reason: On two occurrences on Mystère-Falcon 50 aeroplanes in service, it was 

detected that two pipes had been swapped in maintenance at the frame 42 

firewall. The swapped lines are the extinguishing system line to engine # 2, 

and engine # 2 Low Pressure (LP) bleed line. 

If the swapping of these two lines is not detected and corrected, in case of 

engine # 2 fire, the fire extinguishing capability would not be operational. 

For the reasons described above, this AD requires an inspection of the 

connection of the two lines (extinguishing and LP bleed lines) at frame 42 in 

the rear compartment and, in case of findings, proper re-installation of the 

lines. This AD requires as well reporting to Dassault Aviation. 

This AD is considered to be an interim measure and, depending on the 

inspection results provided by operators, further AD action may follow. 

Effective Date: 21 February 2011 

Required Action(s) 

and Compliance 

Required as indicated, unless accomplished previously: 

(1) Within 8 days after the effective date of this AD, inspect the connection of 
EASA AD No.: 2011-0025-E 

EASA Form 111 Page 2/2

Time(s): two lines (extinguishing and LP bleed lines) at frame 42 in the rear 

compartment, in accordance with Dassault Aviation Service Bulletin (SB) 

F50-519. 

(2) In case of findings, before next flight, properly re-install theses lines, in 

accordance with Dassault Aviation SB F50-519. 

(3) Within 10 days after accomplishment of the inspection, as required by 

paragraph (1) of this AD, report the inspection results (including no 

findings) to Dassault Aviation. 

Ref. Publications: Dassault Aviation Service Bulletin F50-519, original issue dated 18 February 

2011. 

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. The safety assessment has requested not to implement the full 

consultation process and an immediate publication and notification. 

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.