EASA AD No.: 201 4

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TE.CAP.0011 1

- 00 4 © European Aviation Safety Agency. All rights reserved. 1 / 3 Proprietary document. Copies are not controlled. Confirm revision status through the EASA

- Internet/Intranet. 

## EASA EMERGENCY AIRWORTHINESS DIRECTIVE

AD No.: 201 4

- 0 215

- E

Date : 24 September 201 4

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 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 E U 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 ope rate an aircraft to which an AD applies, except in accordance w ith 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) exempt ion]

.



### Design Approval Holder’s Name :

AGUSTA

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

AB139 and AW139 helicopters

TCDS Number: EASA.R.006

Foreign AD: Not applicable

Supersedure : This AD supersedes EASA Emergency AD 2014

- 0073

- E dated 20 March 2014.



### ATA 62 Main Rotor

– Rotating Scissor s

– Inspection / Modification

Manufacturer(s): AgustaWestland S.p.A (formerly Agusta S.p.A.), AgustaWestland Philadelphia Corporation (formerly Agusta Aerospace Corporation)

.

Applicability: AB139 and AW139 helicopters , all serial numbers

Reason: Some cases of dislodging of lower half scissor spherical bearing s Part Number ( P/N ) 3G6230V00654 have been reported on in

- service helicopters

. These spherical bearings are installed on main rotor ( M / R ) Rotating Scissors P/N
3G6230A00733

. As a result of the investigations accomplished by the supplier of the spherical bearings , it was determined that a quality issue may have affected the production of these bearings.

This condition, if not detected and corrected, could lead to loss of control of the helicopter.

To address this potential unsafe condition, AgustaWestland published Alert Bollettino Tecnico (BT) 139

- 3 68 , providing inspection and replacement
instructions and identifying by serial number (s/n) specific batch es of potentially affected M/R Ro tating Scissors (Table 1 in the BT) and spherical bearing s (Table 2 in the BT)

. Consequently

, EASA issued Emergency AD 2014

- 0073

- E to requir e repetitive inspection s of the affected M / R Rotating Scissors P/N 3G6230A00733

. T hat
AD also require d replacement of the affected spherical bearings or, as an alternative, replacement of the affected M / R Rotating Scissors

. Since that AD was issued

, further events occurred on some helicopters with
M / R Rotating Scissors P/N 3G6230A00733 installed . In particular

, the liner ofEASA AD No.: 201 4

- 0 215

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TE.CAP.0011 1

- 00 4 © European Aviation Safety Agency. All rights reserved. 2 / 3 Proprietary document. Copies are not controlled. Confirm revision status through the EASA

- Internet/Intranet. the spherical bearing P/N 3G6230V00654 w as found chipped and

, in some

cases

, early excessive play w as found

. The affected bearings were not part of
the s/n batch as initially established

. T herefore , it was determined that all M/R Rotating Scissor s P/N 3G6230A00733 with spherical bearing P/N
3G6230V00654 are potentially affected.

To address these recent occurrences, AgustaWestland published BT 139

- 392 providing inspection and modification instructions.

For the reasons described above, this AD requires repetitive inspections and modification of the M/R Rotating Scissor s

. Following modification, the inspection interval can be extended.

Effective Date: 26 September 2014

Required Action(s) and Compliance Time(s): Required as indicated, unless already accomplished:

Pre

- modification Inspections

For helicopters equipped with M/R Rotating Scissor s P/N 3G6230A00733

, with

a spherical bearing P/N 3G6230V00654 , except those having special nut P/N
3 G6230A06851 installed (for post

- mod, see paragraph (3) of this AD) :
(1) Within 5 flight hours ( FH ) or 7 days , whichever occurs first after the
effective date of this AD, and, thereafter, prior to each first flight of the day, inspect th e M/R R otating S cissor s P/N 3G6230A00733 and accomplish a n operational check for play and wear of the affected spherical bearing s in accordance with the instructions of AgustaWestland
BT 139

- 392

. Modification

(2) Within 100 FH or 30 days, whichever occurs first after the effective date of this AD, modify the l ower M/R Rotating S cissor s lever assembly installation by introducing a special nut in accordance with the instructions of AgustaWestland BT 139

- 392.

Post

- modification Inspections

For helicopters equipped with M/R Rotating Scissor s P/N 3G6230A00733, with

a spherical bearing P/N 3G6230V00654 and having special nut P/N
3 G6230A06851 installed:

( 3 ) Within 25 FH after the effective date of this AD, or within 25 FH after modification as required by paragraph (2) of this AD, as applicable, and, thereafter, at inter v al s not to exceed 25 FH, inspect the M/R Rotating
Scissor s P/N 3G6230A00733 and accomplish a n operational check for play and wear of the affected spherical bearings in accordance with the instructions of AgustaWestland BT 139

- 392

. Corrective Action(s)

( 4 ) If, during any inspection as required by paragraph (1) or (3) of this AD, as applicable, a ny play beyond the limits or wear is detected, before next flight, replace each affected spherical bearing with a serviceable part or, as an alternative, replace the affected M/R Rotating Scissors

. (5 ) Replacement of parts on a helicopter as required by paragraph (4) of this AD does not constitute terminating action for the repetitive inspections and operational checks as required by paragraph (1) or (3) of this AD , as applicable, for that helicopter

. Installation of parts

(6) From the effe ctive date of this AD, installation on a helicopter of M/R Rotating Scissor s P/N 3G6230A00733 or spherical bearing s P/N
3G6230V00654 is allowed, provided that , following installation, the helicopter is in spected as require d by this AD.EASA AD No.: 201 4

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TE.CAP.0011 1

- 00 4 © European Aviation Safety Agency. All rights reserved. 3 / 3 Proprietary document. Copies are not controlled. Confirm revision status through the EASA

- Internet/Intranet. Ref. Publications: Agusta Westland BT 139

- 392 , original issue dated 23 September 2014

. 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. The results of the safety assessment have indicated the need for immediate publication and notification, without the full public consultation

process

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

- mail: ADs@easa.europa.eu

. 4. For any question concerning the technical content of the requirements i n this AD, please contact Agusta Westland S.p.A.
E

- mail: aw139.mbx@agustawestland.com

.