EASA AD No .: 20 12

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- 001 © European Aviation Safety Agency. All rights reserved. 1 / 3 Proprietary document. Copies are not controlled. Confirm revision status through the EASA

- Internet/Intranet. 

## EASA AIRWORTHINESS DIRECTIVE

AD No .: 20 12

- 0187

Date: 18 September 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 airworthines s 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 Ann ex 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:
TURBOMÉCA Type/Model designation(s):

ARRIEL 1 engines

TCDS Number: EASA.E.073

F oreign AD: Not applicable

Supersedure: None



### ATA 72 Engine

– Airworthiness Limitation Section

– Cycle Counting Aid System

– Modification/Amendment

Manufacturer(s): Turboméca S.A.

Applicability: ARRIEL 1A1, 1A2, 1B, 1C, 1C1, 1C2, 1D, 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 Messerschmidt

- Bölkow

- Blohm) MBB

- BK117

- C1 and

- C2, AgustaWestland (formerly Agusta) A 109 K2, and Sikorsky S

- 76A helicopters.

Reason: Following detailed analysis and review of in

- service feedback performed by Turboméca on the Arriel 1 engines, the chapter 05

- 10 Airworthiness Limitation Section (ALS) of A rriel 1 Maintenance Manuals has been updated in order to clarify the definition and update the requirements relative t o the cycle counting aid system (modification introduced in production by Turboméca modification TU207 or TU2 43 and in

- service, respectively, by Turboméca Service Bulletin (SB) 292800190 or SB 292800168), add associated maintenance tasks, and modify the Power Turbine (PT) partial cycle counting method

. For the reasons described above, t his AD requires to implemen t the set of modifications applied to the chapter 05

- 10 ALS of the Arriel 1 Maintenance Manuals

.

Effective Date: 02 October 2012EASA AD No .: 20 12

- 0 187

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- 001 © European Aviation Safety Agency. All rights reserved. 2 / 3 Proprietary document. Copies are not controlled. Confirm revision status through the EASA

- Internet/Intranet. Required Action(s) and Compliance Time(s): Required as indicated, unless accomplished previously:
(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, as applicable to engine Model, as listed in Appendix 1 of this AD

, a ccomplish the following tasks :

N ew mandatory tasks associated with the cycle counting aid system ( requirements applicable to engines modified in production with Turboméca modification TU207 or TU243 or in service, respectively, with Turboméca SB 292800190 or SB 292800168 ), and defined as follows:

- ”Cycle Counting” coherence/consistency check

- Functional check for the “Cycle Counting” function 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 Maintenance Programme (AMP) and standard practices on the basis of which the operator or the owner ensures the continuing airworthiness of each operated helicopter:
Incorporate the updates described in paragraph (1) of this AD and defined in the chapter 05

- 10 of the applicable A rriel 1 Maintena nce Manual.

and
(2.2) Complying with the approved AMP described in paragraph (2.1) of this AD.

Ref. Public ations: Turboméca ARRIEL 1 Maintenance Manuals, as listed in Appendix 1 of this AD

. 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 substantiated, EASA can approve Alternative Methods of Compliance for this AD

. 2. This AD was posted on 20 A u gust 2012 as PAD 12

- 110 for consultation until 17 September 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 conte nt 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 representative at www.turbomeca

- support.com

.EASA AD No .: 20 12

- 0 187

CAP.0011 0

- 001 © European Aviation Safety Agency. All rights reserved. 3 / 3 Proprietary document. Copies are not controlled. Confirm revision status through the EASA

- Internet/Intranet. 

### Appendix 1

Maintenance Manuals according to Engine Variant , with initial issue/version incorporating the additional requirement of this AD in the ALS :

Engine Variant Maintenance Manual

French Version English Version

ARRIEL 1A1 X 292 B3 452 1 Issue 1 4 X 292 B3 452 2 Issue 1 4

ARRIEL 1A2 X 292 A9 452 1 Issue 1 5 X 292 A9 452 2 Issue 1 5

ARRIEL 1B X 292 65 452 1 Issue 1 4 X 292 65 452 2 Issue 1 4

ARRIEL 1C X 292 B0 452 1 Issue 1 5 X 292 B0 452 2 Issue 1 5

ARRIEL 1C1 X 292 C3 452 1 Issue 1 5 X 292 C3 452 2 Issue 1 5

ARRIEL 1C2 X 292 G1 452 1 Issue 1 5 X 292 G1 452 2 Issue 1 5

ARRIEL 1D X 292 E5 452 1 Issue 1 5 X 292 E5 452 2 Issue 1 5

ARRIEL 1D1 X 292 G2 452 1 Issue 1 5 X 292 G2 452 2 Issue 1 5

ARRIEL 1E2 X 292 M3 452 1 Issue 1 5 X 292 M3 452 2 Issue 1 5

ARRIEL 1K X 292 D8 452 1 Issue 1 5 X 292 D8 452 2 Issue 1 5

ARRIEL 1K1 X 292 H3 452 1 Issue 1 5 X 292 H3 452 2 Issue 1 5

ARRIEL 1S X 292 F9 452 1 Issue 15 X 292 F9 452 2 Issue 15

ARRIEL 1S1 X 292 H4 452 1 Issue 15 X 292 H4 452 2 Issue 15