EASA AD No.: 2009-0256

EASA Form 110 Page 1/2 

## EASA AIRWORTHINESS DIRECTIVE

AD No.: 2009-0256

Date: 02 December 2009
Note: This Airworthiness Directive (AD) is i ssued 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 s hall be ensured by accomplishing any applicable ADs. Consequently, no person may opera te an aircraft to which an AD applies, except in accordance with the re quirements 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 : EUROCOPTER Type/Model designation(s) : AS 350 and EC 130 helicopters

TCDS Number : EASA.R.008 Foreign AD : Not Applicable Supersedure: None



### ATA 76 Engine controls – Contactors 53Ka and 53Kb – Check

Manufacturer(s): Eurocopter Applicability: AS350 B3 and EC130 B4 helicopters, all serial numbers, if equipped with the ARRIEL 2B1 engine associated with the two-channel FADEC, and embodying modification (MOD) 073254 (AS 350 B3) or MOD 073773 (EC 130 B4) (new twist grip). Reason: During trouble-shooting analysis perfor med by Eurocopter, it was found that there is the risk of a dormant failure of one of the two contactors 53Ka or 53Kb following the introduction of MOD 073254 (AS350 B3) or MOD 073773 (EC130 B4). Failure of the other contactor, associated with this dormant failure, can prevent switching from "IDLE" mode to "FLIGHT" mode during training of autorotation landing, which would make impossible aborting the autorotation, even if needed, and compel the pilot to continue autorotation until touchdown. For the reason stated above, pending a modi fication of the definition, this AD requires repetitive checks of the contac tors 53Ka and 53Kb for correct opening and closing in order to detect their dormant failure.
Effective Date: 16 December 2009EASA AD No.: 2009-0256

EASA Form 110 Page 2/2 Required action(s) and Compliance Time(s): Required as indicated, unless accomplished previously: Before the next training of autorotatio n landing, but no later than 100 flying hours (FH) after the effective date of this AD, whichever occurs first, check the IDLE and FLIGHT controls on the pilot’s and co-pilot’s twist grips in accordance with paragraph 2 of Eurocopter Alert Serv ice Bulletin (ASB) No. 05.00.61 or No. 05A009, depending on the helicopter model, and thereafter repeat this check at intervals not exceeding 600 FH. Ref. Publications: Eurocopter AS 350 Alert Servic e Bulletin No. 05.00.61 revision 0 dated 12 November 2009; Eurocopter EC 130 Alert Service Bulletin No. 05A009 revision 0 dated 12 November 2009: 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 subs tantiated, EASA can approve Alternative Methods of Compliance for this AD. 2. The required actions and the risk a llowance 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, Certific ation Directorate, EASA. E-mail: ADs@easa.europa.eu

. 4. For any question concerning the technica l content of the requirements in this AD, please contact: EUROCOPTER (STDI) - Aéroport de Marseille Provence 13725 Marignane Cedex, France. Telephone +33 (0) 4 42 85 97 97, Fax +33 (0) 4 42 85 99 66 E-mail: Directive.technical-support@eurocopter.com

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