EASA AD No.: 2013-0173

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EASA AIRWORTHINESS DIRECTIVE

AD No.: 2013-0173

Date: 01 August 2013

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 EU 748/2012, Part 21.A.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:

EUROCOPTER

Type/Model designation(s):

AS 332 L1 and EC 225 LP helicopters

TCDS Number: EASA.R.002

Foreign AD: Not applicable

Supersedure: None

ATA 30

Ice and Rain Protection – Electrical Multi-Purpose Air Intakes –

Modification

Manufacturer(s): Eurocopter (formerly EUROCOPTER France)

Applicability: AS 332 L1 helicopter manufacturer serial number (S/N) 2774, and EC 225 LP 

helicopter manufacturer S/N 2600, S/N 2623, S/N 2645, S/N 2656, S/N 2659, 

S/N 2663, S/N 2666, S/N 2670, S/N 2673, S/N 2685, S/N 2691, S/N 2692, S/N 

2693, S/N 2702, S/N 2715, S/N 2716, S/N 2721, S/N 2725, S/N 2739, S/N 

2744, S/N 2747, S/N 2753, S/N 2756, S/N 2759, S/N 2767, S/N 2779 and S/N 

2794.

Reason: For some helicopters equipped with electrical Multi-Purpose Air Intakes (MPAI),

power generation failure conditions were identified that would cause power 

supply loss of the engine electro-valves controlling inflation of the MPAI seals to 

close the engine air intakes. The power supply loss on these electro-valves

results in deflation or not inflation of MPAI seals on both engine air intakes.

This condition, if not corrected, could lead to ice ingestion by the engines during 

flight in icing conditions possibly resulting in dual engine flame-out.

To address this unsafe condition, Eurocopter issued Alert Service Bulletin 

(ASB) No.AS332-30.00.74 and ASB No.EC225-30A032 to provide modification 

of some electrical bus bars and circuit breakers (MOD 332P083736.01, MOD 

332P083736.02 and MOD 332P083736.05) for affected helicopters.

For the reasons described above, this AD requires accomplishment of 

modification MOD 332P083736.01 or MOD 332P083736.02 or MOD 

332P083736.05, as applicable to helicopter model and serial number, and 

update the Rotorcraft Flight Manual (RFM).
EASA AD No.: 2013-0173

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Effective Date: 08 August 2013

Required Action(s) 

and Compliance

Time(s):

Required as indicated, unless accomplished previously:

(1) Within 110 flight hours after the effective date of this AD, accomplish 

modification specified in Table 1 below, as applicable to helicopter model 

and serial number, in accordance with the instructions of paragraph 3. of

Eurocopter ASB No.AS332-30.00.74 or ASB No EC225-30A032, as 

applicable to helicopter models.

Table 1

Helicopter models and serial numbers 

(S/N)

Required modification 

AS 332 L1 with S/N 2774 MOD 332P083736.05

EC 225 LP with S/N 2600, S/N 2623, S/N 

2645, S/N 2656, S/N 2659, S/N 2663, S/N 

2666, S/N 2670, S/N 2673, S/N 2693

MOD 332P083736.01

EC 225 LP with S/N 2685, S/N 2691, S/N 

2692, S/N 2702, S/N 2715, S/N 2716, S/N 

2721, S/N 2725, S/N 2739, S/N 2744, S/N 

2747, S/N 2753, S/N 2756, S/N 2759, S/N 

2767, S/N 2779, S/N 2794

MOD 332P083736.02

(2) Concurrently with the modification as required by paragraph (1) of this AD

amend the RFM by inserting a copy of the pages of the Appendix of 

Eurocopter ASB No.AS332-30.00.74 or ASB No EC225-30A032, as 

applicable to helicopter model, and operate the helicopter accordingly.

The RFM amendment can also be accomplished by incorporating later 

applicable RFM revisions.

Ref. Publications: Eurocopter ASB No.AS332-30.00.74, revision 0, dated 31 July 2013.

Eurocopter ASB No.EC225-30A032, revision 0 dated 31 July 2013.

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. Based on the required actions and the compliance time, EASA have 

decided to issue a Final AD with Request for Comments, postponing the 

public consultation process until 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 content of the requirements in 

this AD, please contact:

EUROCOPTER (STDI) – Aéroport de Marseille Provence 13725 

Marignane Cedex, France 

Telephone +33 (4) 42 85 97 97, Facsimile +33 (4) 42 85 99 66 

E-mail: Directive.technical-support@eurocopter.com.