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## EASA AIRWORTHINESS DIRECTIVE

AD No.: 2008-0016 R1

Date: 22 February 2008

Type Approval Holder’s Name:

Thielert Aircraft Engines Type/Model designation(s):

TAE125-01 engines

TCDS Numbers: EASA E.055

Foreign AD: Not applicable

Revision: This Airworthiness Directive (AD) revises and replaces AD 2008-0016, including the ‘Correction’ thereof, both dated 22 January 2008.



### ATA 79 Engine Oil System – Piston Cooling Nozzles – Inspection

Manufacturer: Thielert Aircraft Engines

Applicability: TAE125-01 engines, all serial numbers, except engines that have been modified in accordance with TAE Design Modification No. 2007-001.

These engines are known to be installed on, but not limited to, Cessna 172 and (Reims-built) F172 series (EASA STC Nr. EASA.A.S.01527); Piper PA-28 series (EASA STC Nr. EASA.A.S.01632), APEX (R obin) DR 400 series (EASA STC Nr. EASA.A.S.01380); and Diamond DA40 and DA42 aircraft.

Reason: In-flight engine shutdown incidents were reported on aircraft equipped with TAE125-01 engines. This was found to be main ly the result of operation over a long time period with broken piston coo ling oil nozzles which caused thermal overload of the piston. Consequently, the German Federal Bu reau for the investigation of transportation accidents (BFU) issued Safety Recommendation no. 10/2007.

For the reasons stated above, this Airw orthiness Directive (AD) requires the inspection of all affected TAE125-01.
This AD has been revised to exclude engines that have been modified in accordance with TAE Design Modification No. 2007-001. Thielert Aircraft Engines (TAE) Service Bulletin ( SB) TM TAE125-0017 has been updated to Revision 2, dated 22 February 2008, and now includes an approved alternative inspection method.

Effective Date: 05 February 2008

Compliance Required as indicated, unless accomplished previously:

### 2/2 (1) Within the next 110 Flight Hours (F H) or 6 months or during the next scheduled maintenance, whichever occurs first after the effective date of this directive, inspect the piston c ooling nozzle in accordance with the instructions of Thielert Aircraft Engines TM TAE125-0017;
(2) Thereafter, at intervals not to exc eed 100 FH (+/- 10 FH), inspect the piston cooling nozzle in accordance with the instructions of Thielert Aircraft Engines TM TAE125-0017;
(3) When a broken piston cooling nozzle is found during any inspection as required by paragraph (1) or (2) of this AD, contact TAE, do not operate the engine anymore and send it back to TAE.

Ref. Publications: Thielert Service Bulletin TM TAE125-0017 dated 14 December 2007.
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 substant iated, EASA can accept Alternative Methods of Compliance for this AD.
2. The original issue of this AD was posted on 21 December 2007 as PAD 07- 230 for consultation until 18 January 2008. The Comment Response Document can be found at http://ad.easa.europa.eu/

. 3. Enquiries regarding this AD should be referred to the AD Focal Point - Certification Directorate, EASA. E-mail: ADs@easa.europa.eu
4. For any questions concerning the c ontent of this AD, please contact: Thielert Aircraft Engines Platanenstraße 14 D-09350 Lichtenstein, Germany Telephone +49-37204-696-0; Fax +49-37204-696-55; E-mail info@centurion-engines.com