EASA AD No.: 2012-0187R2

TE.CAP.00110-003 © European Aviation Safety Agency. All rights reserved. 1/4 Proprietary document. Copies are not controlled. Co nfirm revision status through the EASA-Internet/Int ranet. 

## EASA AIRWORTHINESS DIRECTIVE

AD No.: 2012-0187R2

Date: 06 December 2012

Note: This Airworthiness Directive (AD) is issued b y EASA, acting in accordance with Regulation (EC) No 216/2008 on behalf of the Europe an 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, P art 21.A.3B. In accordance with EC 2042/2003 Annex I, Part M.A.301, the continuing airworthiness of an aircraft shall be en sured by accomplishing any applicable ADs. Conseque ntly, no person may operate an aircraft to which an AD applies, except in accor dance with the requirements of that AD, unless othe rwise specified by the Agency [EC 2042/2003 Annex I, Part M.A.303] or agreed with the Authority of the State of Registry [EC 216/200 8, Article 14(4) exemption]. 

### Design Approval Holder’s Name: TURBOMÉCA Type/Model designation(s): ARRIEL 1 engines

TCDS Number: EASA.E.073

Foreign AD: Not applicable

Revision: This AD revises EASA AD 2012-0187R1 dated 11 October 2012.



### ATA 72 Engine – Airworthiness Limitation Section – Cycle C ounting Aid

System – Modification/Amendment

Manufacturer(s): Turboméca S.A.

Applicability: ARRIEL 1A1, 1A2, 1B, 1C, 1C1, 1C2, 1 D, 1D1, 1E2, 1K, 1K1, 1S and 1S1 turbo-shaft engines, all serial numbers. These engines are known to be installed on, but not limited to, Eurocopter (formerly Eurocopter France, Aerospatiale) AS 350 B , BA, BB, B1 and B2, and AS 365 N, Eurocopter Deutschland (formerly Mess erschmitt-BölkowBlohm) MBB-BK117-C1 and -C2, AgustaWestland (former ly Agusta) A 109 K2, and Sikorsky S-76A helicopters.
Reason: Following detailed analysis and review of i n-service feedback performed by Turboméca on the ARRIEL 1 engines, the chapter 05-1 0 Airworthiness Limitation Section (ALS) of ARRIEL 1 Maintenance Ma nuals has been updated in order to clarify the definition and upda te the requirements relative to the cycle counting aid system (modification intr oduced in production by Turboméca modification TU207 or TU243 and in-servic e, respectively, by Turboméca Service Bulletin (SB) 292800190 or SB 292 800168), add associated maintenance tasks, and modify the Power Turbine (PT) partial cycle counting method. Failure to comply with the instructions contained i n these documents could result in an unsafe condition. To address this potential unsafe condition, EASA is sued AD 2012-0187, requiring implementation of the changes applied to the chapter 05-10 ALS ofEASA AD No.: 2012-0187R2

TE.CAP.00110-003 © European Aviation Safety Agency. All rights reserved. 2/4 Proprietary document. Copies are not controlled. Co nfirm revision status through the EASA-Internet/Int ranet. the ARRIEL 1 Maintenance Manuals. After it was found that only Temporary Revisions of the Maintenance Manuals, referenced in Appendix 1 of EASA AD 2012-0 187, were available, EASA revised the AD to add references in Appendix 1 of the AD to those Maintenance Manual Temporary Revisions as alternati ves to quoted issues of Maintenance Manuals which were not be available yet. Since EASA AD 2012-0187R1 was issued, EASA was made aware that some operators have the engine cycle counting aid s ystem installed on their engine, but do not use it. For the reason described above, this AD is revised to confirm that, if the cycle counting aid system is installed on the engin e but is not used, the requirements of this AD do not apply to that engine

.
Effective Date: Revision 2: 13 December 2012
Revision 1: 25 October 2012 Original issue: 02 October 2012
Required Action(s) and Compliance Time(s): Required as indicated, unless accomplished previous ly: (1) From the effective date of this AD, record the updated definition of the cycle counting aid system and apply the updated PT partial cycle counting method and, within the intervals specified in chapter 05-10 ALS of the ARRIEL 1 Maintenance Manual or alternatively Maintenance Manual Temporary Revision (T/R), as applicable to e ngine Model, as listed in Appendix 1 of this AD, accomplish the fol lowing tasks: New mandatory tasks associated with the cycle coun ting aid system (requirements applicable to engines modified in pro duction with Turboméca modification TU207 or TU243 or in service, respectively, with Turboméca SB 292800190 or SB 292800168), and d efined as follows: - ”Cycle Counting” coherence/consistency check - Functional check for the “Cycle Counting” functi on of the Tachometer Unit. (2) Compliance with the requirements of paragraphs (1) of this AD can be demonstrated by: (2.1) Revising as follows the approved Aircraft Mai ntenance Programme (AMP) and standard practices on the basis of which the operator or the owner ensures the continuing ai rworthiness of each operated helicopter: Incorporate the updates described in paragraph (1) of this AD and defined in the chapter 05-10 of the applicable Arri el 1 Maintenance Manual or, alternatively, Maintenance M anual T/R
and (2.2) Complying with the approved AMP described in paragraph (2.1) of this AD. (3) If the engine cycle counting aid system is inst alled on the engine but is not used, the requirements of paragraphs (1) and (2 ) of this AD are not applicable.

Ref. Publications: Turboméca ARRIEL 1 Maintenance M anuals or Maintenance Manual T/R, as listed in Appendix 1 of this AD. The use of later approved revisions of these docume nts is acceptable for compliance with the requirements of this AD.EASA AD No.: 2012-0187R2

TE.CAP.00110-003 © European Aviation Safety Agency. All rights reserved. 3/4 Proprietary document. Copies are not controlled. Co nfirm revision status through the EASA-Internet/Int ranet. Remarks: 1. If requested and appropriately substantiated, EA SA can approve Alternative Methods of Compliance for this AD. 2. The original issue of this AD was posted on 20 A ugust 2012 as PAD 12- 110 for consultation until 17 September 2012. No co mments were received during the consultation period. 3. Enquiries regarding this AD should be referred t o the Safety Information Section, Executive Directorate, EASA. E-mail: ADs@easa.europa.eu

. 4. For any question concerning the technical conten t of the requirements in this AD, please contact: Turboméca, S.A., ARRIEL 1 Customer Support, 40220 Tarnos, France, Fax: +33 5 59 74 45 15, or contact your usual or nearest Turboméca technical r epresentative at www.turbomeca-support.com

.EASA AD No.: 2012-0187R2

TE.CAP.00110-003 © European Aviation Safety Agency. All rights reserved. 4/4 Proprietary document. Copies are not controlled. Co nfirm revision status through the EASA-Internet/Int ranet. 

### Appendix 1

Maintenance Manuals and Maintenance Manual T/Rs, ac cording to Engine Variant, respectively, with initi al issue/version and reference incorporating the addit ional requirement of this AD in the ALS:

Engine Variant Maintenance Manual Maintenance Manual Temporary Revision
French Version English Version French and English Reference

ARRIEL 1A1 X 292 B3 452 1 Issue 14 X 292 B3 452 2 I ssue 14 05-11

ARRIEL 1A2 X 292 A9 452 1 Issue 15 X 292 A9 452 2 I ssue 15 05-06

ARRIEL 1B X 292 65 452 1 Issue 14 X 292 65 452 2 Is sue 14 05-11

ARRIEL 1C X 292 B0 452 1 Issue 15 X 292 B0 452 2 Is sue 15 05-11

ARRIEL 1C1 X 292 C3 452 1 Issue 15 X 292 C3 452 2 I ssue 15 05-11

ARRIEL 1C2 X 292 G1 452 1 Issue 15 X 292 G1 452 2 I ssue 15 05-11

ARRIEL 1D X 292 E5 452 1 Issue 15 X 292 E5 452 2 Is sue 15 05-11

ARRIEL 1D1 X 292 G2 452 1 Issue 15 X 292 G2 452 2 I ssue 15 05-12

ARRIEL 1E2 X 292 M3 452 1 Issue 15 X 292 M3 452 2 I ssue 15 05-13

ARRIEL 1K X 292 D8 452 1 Issue 15 X 292 D8 452 2 Is sue 15 05-05

ARRIEL 1K1 X 292 H3 452 1 Issue 15 X 292 H3 452 2 I ssue 15 05-06

ARRIEL 1S X 292 F9 452 1 Issue 15 X 292 F9 452 2 Is sue 15 05-07

ARRIEL 1S1 X 292 H4 452 1 Issue 15 X 292 H4 452 2 I ssue 15 05-11