EASA AD No.: 201 3

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TE. CAP.0011 1

- 00 3 © European Aviation Safety Agency. All rights reserved. 1 / 2 Proprietary document. Copies are not controlled. Confirm revision status through the EASA

- Internet/Intranet. 

## EASA EMERGENCY AIRWORTHINESS DIRECTIVE

AD No

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Date: 30 October 201 3

Note: This Emergency Airworthiness Directive (AD) is issued by EASA, acting in accordance with Regulation (EC) No 216/2008 on behalf of the European Community, its Memb er 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 contin uing 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 Age ncy [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]

.



### D e sign Approval Holder’s Name :

AGUSTA

WESTLAND S.p.A. Type/Model designation(s) :

A109, AW109

, A119 and AW119 helicopters

TCDS Number: EASA. R .0 05

F oreign AD : Not applicable

Supersedure: None



### ATA 62 Main Rotor

– Rotating Controls and S washplate A ssembly

– Swash plate Support Nut

– Inspection / Replacement

Manufacturer(s): AgustaWestland S.p.A (formerly Agusta S.p.A.)

.

Applicability: A109 A, A109AII and A109C helicopters, all serial numbers (S/N);

A109 E helicopters , all S/N;

A109 K2 helicopters , all S/N;
A109LUH helicopters

, all S/N ; A109S helicopters, all S/N ; AW109SP helicopters, all S/N ;
A119 and AW119MKII helicopter s, all S/N

.

Reason: Occurrence was reported of one in

- service A109S helicopter, where during scheduled inspection o f the rotating control installation

, two nut s Part Number (P/N) MS21042

- 4 that connect the swashplate support to upper case of the main tran smission were found cracked

. The subsequent technical investigation identified that the reported cracks of the nuts are the results of a production defi ci ency (causing hydrogen embrittlement) at the nut supplier.
This condition, if not detected and correct ed, could lead to failure of the main rotor function, resulting in loss of control of the helicopter

. To address this unsafe condition, AgustaWestland issued s even Bollettino Tecnico (BT), BT 109EP

- 13 1

, BT 109

- 13 7 , BT 109K

- 5 9 , BT 109L

- 06 7 , BT 109S

- 05 6 , BT 109SP

- 0 70 and BT 119

- 6 2 for all helicopters that are potentiallyEASA AD No.: 201 3

- 0 265

- E

TE. CAP.0011 1

- 00 3 © European Aviation Safety Agency. All rights reserved. 2 / 2 Proprietary document. Copies are not controlled. Confirm revision status through the EASA

- Internet/Intranet. affected

. For the reasons described above, this AD requires repetitive inspection s of each nut P/N MS21042

- 4 connect ing the swashplate support to upper case and replacement of each affected nut with a serviceable part having a different P/N

.

Effective Date: 01 Novem ber 201 3

Required A ction(s) and Compliance Time(s): Required as indicated, unless accomplished previously: ( 1 ) Within 10 Flight Hours ( FH ) after the effective date of this AD, a nd, thereafter , at intervals not to exceed 25 FH, inspect each nut P/N MS21042

- 4 for cracks in accordance with the instructions of the applicable BT

. Note: For the purpose of this AD, the applicable BT is the one mentioned in Ref. Publications of this AD f or the affected helicopter model. ( 2) If, during any inspection as required by paragraph (1) of this AD, a nut is found cracked, before next flight, replace each nut with a serviceable part in accordance with the instructions of the applicable BT. (3) Unle ss each nut P/N MS21042

- 4 was replaced with a serviceable nut as required by paragraph (2) of this AD, w ithin 3 months after the effective date of this AD, replace each nut P/N MS21042

- 4 with a serviceable part in accordance with the instructions of the ap plicable BT

. (4) Replacement of each nut as required by paragraph (2) or (3) , as applicable, constitutes terminating action for the repetitive inspections as required by paragraph (1) of this AD. ( 5 ) From the effective date of this AD, do not install a nu t having a P/N MS21042

- 4 for connect ing the swashplate support to upper case on an helicopter.

Ref. Public ations: AgustaWestland BT 109EP

- 13 1 dated 29 October 2013

. AgustaWestland BT 109

- 13 7 dated 29 Octo ber 201 3

. AgustaWestland BT 109K

- 5 9 dated 29 Octobe r 2013

. AgustaWestland BT 109L

- 06 7 dated 29 October 2013

. AgustaWestland BT 109S

- 05 6 dated 29 October 2013

. AgustaWestland BT 109SP

- 0 70 dated 29 October 2013

. AgustaWestland BT 119

- 6 2 dated 29 October 2013

. The use of later approved revisions of the s e docu ment s 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. The results of the safety assessment ha ve indicated the need for i mmediate publication and notification , without the full public consultation process

. 3. Enquiries regarding this AD should be referred to the Safety Information Section, Executive Directorate, EASA. E

- mail: ADs@easa.eu ropa.eu

. 4. For any question concerning the technical content of the requirements in this AD, please contact : Agusta S.p.A. Customer Support Via del Gregge, 100

- 21015 Lonate Pozzolo (VA)

– Italy Telephone + 39 0331 664600 ; Fax: + 39 0331 664684 E

- mail: custserv@agustawestland.com

.