EASA AD No.: 2012-0150

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EASA AIRWORTHINESS DIRECTIVE

AD No.: 2012-0150

Date: 08 August 2012

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 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:

TURBOMECA

Type/Model designation(s):

ARRIUS 2F engines 

TCDS Number: France n°M22

Foreign AD: Not applicable

Supersedure: This AD supersedes DGAC AD 1999-233 (A) dated 12 June 1999.

ATA 73 Engine Fuel & Control – Privilege Injector – Replacement

Manufacturer(s): Turboméca

Applicability: ARRIUS 2F engines, all serial numbers.

These engines are known to be installed on, but not limited to, Eurocopter 

EC120B helicopters.

Reason: During inspections carried out at the repair workshop on variants similar to 

ARRIUS 2F, it was found that some main injectors were totally or partially 

blocked. Blockage of the injectors may lead to engine flame out during rapid 

engine deceleration.

This condition, if not corrected, could lead to an uncommanded engine in-flight 

shut down and may ultimately lead to an emergency landing.

To address this unsafe condition, DGAC issued AD 1999-0233 (A) which 

required periodical replacement of fuel manifolds.

Since issuance of AD 1999-0233 (A), further investigations demonstrated that:

a periodic flow rate check (water technology) and the cleaning required by

DGAC AD 1999-0233 (A) did not meet the expected results (wrong 

indication and non-sufficient cleaning), and,

replacement of the privilege injector only ensures the airworthiness of the 

engine in case of blockage of the injection manifolds combined with a rapid 

engine deceleration.

For the reasons described above, this AD requires replacement of the privilege 

injector before exceeding a defined limit of operating hours as specified in 

Turboméca Mandatory Service Bulletin (MSB) N° A319 73 4001.
EASA AD No.: 2012-0150

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Effective Date: 22 August 2012

Required Action(s) 

and Compliance 

Time(s):

Required as indicated, unless accomplished previously:

(1) Before exceeding 400 privilege injector operating hours since new or 400 

privilege injector operating hours since last accomplishment of Turboméca 

Mandatory Service Bulletin (MSB) N° A319 73 4001, as applicable, replace 

the privilege injector with a serviceable privilege injector.

Note: For the purpose of this AD, a serviceable privilege injector is a part 

that has accumulated less than 400 operating hours since new or since 

last accomplishment of Turboméca MSB N° A319 73 4001.

(2) From the effective date of this AD, do not install a privilege injector on an 

engine, or an engine on a helicopter, unless in compliance with the 

requirements of paragraph (1) of this AD.

Ref. Publications: TURBOMECA MSB N° A319 73 4001 issue K dated 10 February 2012.

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 10 July 2012 as PAD 12-078 for consultation until 

07 August 2012. No comments were received during the consultation 

period.

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:

Turboméca, S.A., ARRIUS Customer Support, 40220 TARNOS, FRANCE. 

Fax: +33 5 59 74 45 15; or contact your nearest technical representative at 

www.turbomeca-support.com.