EASA AD No.: 2008-0106-E 

EASA Form 111 Page 1/2 

EASA EMERGENCY AIRWORTHINESS DIRECTIVE 

AD No.: 2008-0106-E 

Date: 30 May 2008 

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 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 be ensured by accomplishing any applicable ADs. Consequently, no person may operate an 

aircraft to which an AD applies, except in accordance with 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]. 

Type Approval Holder’s Name : 

Thielert Aircraft Engines GmbH 

Type/Model designation(s) : 

TAE125-02-99 engines 

TCDS Number : EASA E.055 

Foreign AD : Not applicable 

Supersedure: This Airworthiness Directive (AD) supersedes AD 2008-0100-E dated 23 May 2008. 

ATA 72 Engine - Clutch Assembly - Replacement 

Manufacturer(s): Thielert Aircraft Engines GmbH 

Applicability: 

All TAE125-02-99 (commercial designation Centurion 2.0) engines having the 

clutch assembly P/N 05-7211-K000304 installed. 

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 (Robin) DR 400 series (EASA STC Nr. 

EASA.A.S.01380) and Diamond DA40 and DA42 aircraft. 

Reason: 

In-flight engine shutdown incidents have been reported on aircraft equipped with 

TAE125-02-99 engines. Preliminary investigations showed that it was mainly the 

result of cracked disc springs in the clutch. This condition, if not corrected, could 

result in further cases of engine in-flight shutdown and the consequent loss of 

control of the aircraft. 

To address this unsafe condition, AD 2008-0100-E was published to mandate 

repetitive inspections until a new clutch P/N 05-7211-K006001 is installed. 

Since that publication, data collected from the performed inspections revealed 

that sole the clutch assembly P/N 05-7211-K000304 was subject to failure. 

For the reasons stated above, this EASA AD supersedes AD 2008-0100-E and 

requires the removal of the affected clutch assemblies P/N 05-7211-K000304 on 

all TAE125-02-99 engines and their replacement by new clutches of an improved 

design. 
EASA AD No.: 2008-0106-E 

EASA Form 111 Page 2/2 

Effective Date: 03 June 2008 

Required action(s) 

and Compliance 

Time(s): 

Required as indicated, unless accomplished previously: 

(1) For engines that have accumulated, on the effective date of this AD, less than 

50 Flight Hours (FH) since the last clutch inspection: 

Upon the accumulation of 50 FH since last clutch inspection, replace the 

clutch in accordance with the instructions of Thielert Aircraft Engines Service 

Bulletin TM TAE 125-1006 P1, Revision 1. 

(2) For engines that have accumulated, on the effective date of this AD, between 

50 FH and 300 FH since the last clutch inspection: 

Before further flight, replace the clutch in accordance with the instructions of 

Thielert Aircraft Engines Service Bulletin TM TAE 125-1006 P1, Revision 1. 

For the purpose of this AD, one Ferry Flight to a Maintenance Station is allowed 

to accomplish the engine clutch replacement required by paragraph (1) and (2) of 

this AD. The maximum flight duration shall be not more than 2 hours and be 

limited to VFR conditions. 

Ref. Publications: 

Thielert Aircraft Engines GmbH SB TM TAE 125-1006 P1 Revision 1 dated 30 

May 2008. 

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 safety assessment has requested not to implement the full consultation 

process and an immediate publication and notification. 

3. Enquiries regarding this AD should be referred to the Airworthiness 

Directives, Safety Management & Research Section, Certification Directorate, 

EASA; E-mail: ADs@easa.europa.eu. 

4. For any questions concerning the technical content of the requirements in this 

AD, please contact: 

Thielert Aircraft Engines, Platanenstraße 14, D-09350 Lichtenstein, Federal 

Republic Germany; telephone +49-37204-696-0; fax +49-37204-696-55; 

E-mail info@centurion-engines.com