E ASA AD No.: 2013

- 0095

- E

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

. : 2013 - 0095 - E

Date: 16 April 2013

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 ) exemption]. 

### Design Approval Holder’s Name: 

### EUROCOPTER Type/Model designation(s): 

### AS 350 and AS 355 helicopters

TCDS Number: EASA.R. 008
F oreign AD: Not Applicable Supersedure: No ne



### ATA 6 7 Rotor Flight Controls

– Main/Tail R otor Servo - Control Bearing s – Inspection / Replacement

Manufacturer(s): Eurocopter (formerly Eurocopter France, Aerospatiale ) Applicability: AS 350 B, AS 350 BA, AS 350 BB, AS 350 B1, AS 350 B2, AS 350 B3 and AS 350 D , AS 355 E, AS 355 F, AS 355 F1, AS 355 F2, AS 355 N, AS 355 NP helicopters , all serial numbers , equipped with single hydraulic main and tail servo - controls manufactured by “SAMM”, “TRW”, “GOODRICH”, or “UTAS”

. Reason: E xcessive axial play was detected on bearings Part Number ( P/N ) 801462 installed on the input lever of the main and tail rotor servo - controls

. The defective bearing s could also have been fitted on servo - controls repaired at the "UTC AEROSPACE SYSTEMS" premises in the "Monroe, N/C, USA" repair station

. This defect could initiate an excessive lever/distributor off

- centring of the slide valve , causing the distributor slide valve to jam in its sleeve

. For helicopter s with single hydraulic main and tail servo

- controls, t his condition, if not detected and corrected, could lead to a hard

- point (friction point) in the flight controls and increase pilot work load , which would make it necessary to cut

- off of the hydraulic power and to follow the procedures specified in the applicable S ection 3 of the Ro torcraft Flight Manual (RFM)

. For the reasons described above, this AD requir es ident ification of the affected servo - control units and, when an affected servo

- control is found installed , repetitive pre - flight check s and replacement of the affected main and /or tail servo - controls

. Effective Date: 18 April 2013E ASA AD No.: 2013

- 0095

- 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. Required A ction(s) and Compliance Time(s) : Required as indicated, unless accomplished previously: (1) W ithin 10 flight hours ( FH ) or 7 days, whichever occurs first after the effective date of this AD , verify if any affected bearing is fitted in the single hydraulic main and/ or tail servo

- controls in accordance with the instructions of paragraph 1.E.2 of Eurocopter AS350 E mergency A lert S ervice B ulletin (ASB) No. 67.00.60, or AS355 ASB No. 67.00.41, as applicable to helicopter type

. (2) I f, during the inspection as required by paragraph (1) of this AD , it is found that any servo - control installed on the in

- service rotorcraft is equipped with a non - compliant bearing, before next flight , and, thereafter, d uring each pre - flight check (RFM, Section 4), check each affected servo - control for free

- tra vel. (3) If , during any pre - flight check of the free

- travel of the servo

- controls as required by paragraph (2) of this AD, a “friction point” is detected, before next flight , replace the servo

- control with a serviceable one in accordance with the instructions of Section 3 of Eurocopter AS350 ASB No. 67.00.60, or AS355 ASB No. 67.00.41, as applicable to helicopter type

. (4) Unless already accomplished as required by paragraph (3) of this AD, within 50 FH or 120 days, whichever occurs first after the effective date of this AD , replace each affected servo - control with a serviceable one in accordance with the instructions of Sec tion 3 of Eurocopter AS350 ASB No. 67.00.60, or AS355 ASB No. 67.00.41, as applicable to helicopter type

. (5) From the effective date of this AD , do not install on any helicopter any servo - control , unless it h as passed the inspect ion in accordance with the instructions of paragraph 1E.1.a or 1.E.1.b of Eurocopter AS350 ASB No. 67.00.60, or AS355 ASB No. 67.00.41, as applicable to helicopter type

. Ref. Public ations: Eurocopter AS350 ASB No. 67.00.60 dated 15 April 2013

. Eurocopter AS35 5 ASB No. 67.00.41 dated 15 April 2013

. The use of la ter approved revisions of th e s e document 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 have indicated the need for immediate publication and notification, without the full public consultation process

. 3. Enquiries regarding this A D should be referred to the Safety Information Secti on, 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: EUROCOPTER

- Customer Service Technical Support Department, Aéroport de Marseille, Provence 13725 Marignane Cedex

– France Telephone: + 33 (0)4 42 85 99 51, Fax: + 33 (0)4 42 85 99 66 E

- mail: Directive.technical

- support@eurocopter.com

.