EASA AD No.: 2009-0130

EASA Form 110 Page 1/2 

## EASA AIRWORTHINESS DIRECTIVE

AD No.: 2009-0130

Date: 23 June 2009

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 parti cipate 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 a pplicable ADs. Consequently, no person may operate an aircraft to which an AD applies, except in accordance wi th 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 :
AIRBUS Type/Model designation(s) :
A340-500/-600 aeroplanes

TCDS Number : EASA.A.015

Foreign AD : Not applicable

Supersedure : None



### ATA 29 Hydraulic Power – Yellow Hydraulic System – Inspection

Manufacturer(s): AIRBUS (formerly AIRBUS INDUSTRIE)

Applicability: AIRBUS A340 model -541, -542, -642 and -643 aeroplanes, all manufacturer serial numbers.
Reason: Following successive ECAM warnings during the approach phase, just after the landing gear extension sequence and an uneventful landing, the maintenance inspection on an Airbus A340 has revealed an hydraulic leak that was caused by the failure of the Yellow high pressure (HP) hydraulic pipe supplying the back-up Nose Wh eel Steering (NWS) which runs along the lower part of the avionic bay from frame 17 to frame 20. This leak resulted in the loss of the Yellow hydraulic system and contamination of the avionics bay with sprayed hydraulic fluid. This condition, if not detected and correc ted, could result in an ingestion of hydraulic fluid in the electrical connectors, which could generate an arcing phenomenon and, if sufficient energy is provided by the arcing, lead to an ignition source, which would be an unsafe condition. This AD requires the repetitive inspection of the Yellow HP hydraulic line from frame 17 to the elbow connect ion near frame 20, the application of the associated corrective actions, as necessary, and the repetitive performance of a bleeding of the NWS system to verify the correct installation and condition of the HP hydraulic line.EASA AD No.: 2009-0130

EASA Form 110 Page 2/2 Effective Date: 07 July 2009

Required action(s) and Compliance Time(s): Required as indicated: (1) Unless already accomplished, perform a detailed visual inspection of the Yellow HP hydraulic line from frame 17 to the elbow connection near frame 20, apply the associated corrective actions, and perform a bleeding of the NWS system to verify the correct installation and condition of the HP hydraulic line, in accordance with the instructions defined in AIRBUS All Operators Telex A340-29A5014: - within 100 Flight Cycles (FC) from the effective date of this AD, for aeroplanes having accumu lated at the effective date of this AD more than or equal to 1 000 FC from the aeroplane first flight,

or - within 250 FC from the effective date of this AD, for aeroplanes having accumulated at the effective date of this AD less than 1 000 FC from the aeroplane first flight. (2) Repeat the actions required in paragraph (1) of this AD at intervals not exceeding 500 FC.

Ref. Publications: AIRBUS A ll Operators Telex A340-29A5014 dated 14 October 2008. 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 posted on 13 May 2009 as PAD 09-067 for consultation until 12 June 2009. No comments were received during the consultation period. 3. Enquiries regarding this AD should be referred to the Airworthiness Directives, Safety Management & Re search Section, Certification Directorate, EASA. E-mail: ADs@easa.europa.eu

. 4. For any question concerning the te chnical content of the requirements in this AD, please contact: AIRBUS – Airworthiness Office – EAL Fax +33 5 61 934451, E-mail: airworthiness.A330-A340@airbus.com

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