EASA AD No : 2010-0017

EASA Form 110 Page 1/2 

## EASA AIRWORTHINESS DIRECTIVE
AD No.: 2010-0017

Date: 29 January 2010
Note: This Airworthiness Directive (AD) is i ssued 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 t he activities of EASA under Article 66 of that Regulation. This AD is issued in accordance with EC 1702/2003, Part 21A.3 B. In accordance with EC 2042/2003 Annex I, Part M.A.301, the continuing airworthiness of an aircraft s hall be ensured by accomplishing any applicable ADs. Consequently, no person may opera te an aircraft to which an AD applies, except in accordance with the requirements of that AD, unless otherwise specified by the Agenc y [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].


### Type Approval Holder’s Name : WSK "PZL- Ś widnik" S.A. Type/Model designation(s) : PZL W-3A and PZL W-3AS helicopters

TCDS Number : EASA.R.007
Foreign AD : Not applicable
Supersedure : None



### ATA 24 Electrical Power – Generator Air Outlet Collector Attachment – Modification

Manufacturer(s): WSK "PZL- Ś widnik" S.A.
Applicability: PZL W-3A and W-3AS helicopters, all serial numbers.

Reason: A case has been reported where, during flight, control stick movement was restricted over a quarter of the entire range. Post-flight investigation showed that this incident was caused by rotation of a loose generator air outlet collector, resulting in locking of the longitudinal c ontrol system hydraulic actuator fork end. This condition, if not corrected, could lead to further incidents of restricted control stick movement, possibly resulting in loss of control of the helicopter. For the reasons stated above, this AD requires modification of the generator air outlet collector attachments by installati on of a cable and replacement of the welded clamping rings with riveted rings. Effective Date: 12 February 2010EASA AD No : 2010-0017

EASA Form 110 Page 2/2 Required Action(s) and Compliance Time(s): Required as indicated, unless accomplished previously: (1) Within 1 month after the effective date of this AD modify the generator air outlet collector attachments in accordance with the instructions of WSK “PZL Ś widnik” Service Bulletin (SB) BS-37-09-230. (2) Concurrent with the accomplishment of the modification as required by paragraph (1) of this AD, revise the Operational Documentation in accordance with the instructions of WSK “PZL Ś widnik” SB BS-37-09-230. (3) After modification of a helicopter as required by paragraph (1) of this AD, do not install a GT40PCz8B generator on that helicopter, unless the attachments of that generator have been modified in accordance with the requirements of this AD.

Ref. Publications: WSK "PZL- Ś widnik" S.A. SB BS-37-09-230 dated 13 October 2009. 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 subs tantiated, EASA can approve Alternative Methods of Compliance for this AD. 2. The required actions and the risk a llowance have granted the issuance of a Final AD with Request for Comments, postponing the public consultation process after publication. 3. Enquiries regarding this AD should be referred to the Airworthiness Directives, Safety Management & Re search Section, Certification Directorate, EASA. E-mail ADs@easa.europa.eu

. 4. For any question concerning the tec hnical content of the requirements in this AD, please contact: "PZL- Ś widnik" S.A. A1. Lotników Polskich 1 21-045 Ś widnik, Poland Facsimile +48 81-468 09 01 or -751 20 71 Telephone +48 81-468 09 19 or -751 21 73 E-mail service@pzl.swidnik.pl