EASA AD No.: 2011-0030

EASA Form 110 Page 1/2 

## EASA AIRWORTHINESS DIRECTIVE

AD No.: 2011-0030

Date: 25 February 2011

Note: This Airworthiness Directive (AD) is issued b y EASA, acting in accordance with Regulation (EC) No 216/2008 on behalf of the Europe an Community, its Member States and of the European third countries that participat e 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 airworthiness of an aircraft shall b e ensured by accomplishing any applicable ADs. Cons equently, no person may operate an aircraft to which an Airworthiness D irective applies, except in accordance with the req uirements of that Airworthiness Directive 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, Ar ticle 14(4) exemption].


### Type Approval Holder’s Name :

WSK "PZL-Rzeszów" S.A. Type/Model designation(s) :

PZL-10W series engines

TCDS Number: Poland No. CC-190

Foreign AD: Not applicable

Supersedure: None



### ATA 73 Engine Fuel & Control - Engine Fuel Pump - I nspection

Manufacturer(s): WSK "PZL-Rzeszów" S.A.

Applicability: PZL-10 W engines equipped with an AL RP-5 fuel pump. These engines are known to be installed on, but not limited to PZL W-3AS and PZL W-3A helicopters.

Reason: An uncommanded engine in-flight shutdown of a PZL-10W has been recently reported. The investigation has shown that the uncommanded engine in-flight shutdown was due to excessive spli ne wear on the fuel metering pump shaft.
This condition, if not identified and corrected, ma y lead to further uncommanded in-flight engine shutdowns and conseque nt emergency landings of the affected helicopters.
To address this unsafe condition, WSK "PZL-Rzeszów" S.A. has developed an inspection programme of the fuel meter ing pump shaft. For the reasons described above, this AD requires a n inspection of the fuel metering pump shaft and the accomplishment of the associated corrective actions, as applicable.
This AD is considered to be an interim measure and, depending on the inspection results provided by operators and on the on-going investigation, further AD actions may follow.EASA AD No.: 2011-0030

EASA Form 110 Page 2/2 Effective Date: 11 March 2011

Required action(s) and Compliance Time(s): Required as indicated, unless accomplished previous ly: (1) Within the compliance time indicated in Table 1 of this AD, as applicable to engine configuration, perform a one t ime inspection of the spline teeth on the fuel metering pump shaft for ex cessive wear in accordance with WSK Obligatory Bulletin no. E-19W14 7B/DOA/2010.

Table 1

Engine configuration at the effective date of this AD Compliance time for the inspection

Engine fitted with a fuel metering pump that has accumulated greater than or equal to 1 000 hours of engine operation since new, or since last overhaul. Within a further 25 hours of engine operation after the effective date of this AD.

Engine fitted with a fuel metering pump that has accumulated less than 1 000 hours of engine operation since new, or since last overhaul. Between 975 and 1 000 hours of engine operation since new or since last overhaul, or within 25 hours of engine operation after the effective date of this AD, whichever occurs later.

(2) If, during the inspection required by paragraph (1) of this AD, any discrepancy is found, any further engine operation is prohibited and; within 10 days after accomplishment of the inspecti on, report the findings to "WSK PZL-Rzeszów" S.A. (3) After the effective date of this AD, do not ins tall an ALRP-5 fuel pump on an engine unless in compliance with the requirem ents of this AD.

Ref. Publications: WSK "PZL-Rzeszów" S.A. Obligator y Bulletin no. E-19W147B/DOA/2010. The use of later approved revisions of this documen t is acceptable for compliance with the requirements of this AD.

Remarks : 1. If requested and appropriately substantiated, EA SA can approve Alternative Methods of Compliance for this AD.
2. The required actions and the risk allowance have granted the issuance of a Final AD with Request for Comments, p ostponing the public consultation process after publication. 3. Enquiries regarding this AD should be referred t o the Airworthiness Directives, Safety Management & Research Section, C ertification Directorate, EASA. E-mail ADs@easa.europa.eu

. 4. For any question concerning the technical conten t of the requirements in this AD, please contact:

WSK "PZL-Rzeszów" S.A. ul. Hetma ń ska 120 35-078 Rzeszów POLAND phone: (+48 17) 854-62-00; 854-61-00 fax: (+48 17) 8620750 e-mail: antoni.gnot@wskrz.com