EASA AD No.: 2011-0152-E 

EASA EMERGENCY AIRWORTHINESS DIRECTIVE 

AD No.: 2011-0152-E 

Date: 18 August 2011 

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) : 

TAE 125 engines 

TCDS Number: EASA.E.055 

Foreign AD: Not applicable 

Supersedure: This AD supersedes EASA Emergency AD 2010-0111-E dated 10 June 2010, 

including its Correction dated 11 June 2010. 

ATA 72 Engine – Clutch Assembly – Identification / Replacement 

Manufacturer(s): Thielert Aircraft Engines (TAE) 

Applicability: TAE 125-01 (commercial designation Centurion 1.7), all serial numbers, if a 

clutch assembly with Part Number (P/N) 02-7210-11001R13 is installed, and 

TAE 125-02-99 (commercial designation Centurion 2.0), all serial numbers, if a 

clutch assembly with P/N 05-7211-K006001 or P/N 05-7211-K006002 is 

installed. 

These engines are known to be installed on, but not limited to, the following 

aeroplane types, mostly through application of a Supplemental Type certificate 

(STC): 

- Cessna 172 and (Reims-built) F172 series (STC EASA.A.S.01527), 

- Piper PA-28 series (STC EASA.A.S.01632), 

- CEAPR (APEX, Robin) DR 400 series (STC EASA.A.S.01380), and 

- Diamond DA 40 and DA 42 series. 

Reason: In-flight engine shutdown incidents have been reported on aeroplanes equipped 

with TAE 125 engines. Preliminary investigations showed that it was mainly the 

result of nonconforming disc springs (improper heat treatment) used in a certain 

production batch of the clutch. 

This condition, if not corrected, could result in further cases of engine in-flight 

shutdown and consequent loss of control of the aeroplane. 

To address this unsafe condition, EASA issued Emergency AD 2010-0111-E to 

require identification of the affected P/N clutch assemblies on TAE 125-01 and 

TAE 125-02-99 engines and replacement with new clutch assemblies. 

Since that AD was issued, TAE have identified further affected clutch 

EASA Form 111 Page 1/3
EASA AD No.: 2011-0152-E 

assemblies. The two Service Bulletins (SB/TM) have been revised accordingly, 

adding the serial numbers of those units to the lists. 

For the reasons described above, this AD retains the requirements of EASA AD 

2010-0111-E, which is superseded, and makes reference to the revised TAE 

SB/TM publications for identification and replacement of the affected clutch 

assemblies. 

Effective Date: 22 August 2011 

Required Action(s) 

and Compliance 

Time(s): 

Required as indicated, unless accomplished previously:

(1) Before next flight after the effective date of this AD, identify the serial 

number (s/n) of each P/N 02-7210-11001R13, P/N 05-7211-K006001 and 

P/N 05-7211-K006002 clutch assembly installed on the aeroplane. If the s/n 

of a clutch matches one of those listed in TAE SB TM TAE 125-0021 

Revision 1 (for TAE 125-01 engines) or in TAE SB TM TAE 125-1011 P1 

Revision 1 (for TAE 125-02-99 engines), as applicable to engine model, 

within the compliance time specified in Table 1 or Table 2 of this AD, as 

applicable, replace the clutch assembly with a serviceable part. 

Table 1 – Single engine aeroplanes 

Time accumulated by the 

clutch 

Compliance time 

100 flight hours (FH) or more Before next flight after the effective 

date of this AD (see note below) 

Less than 100 FH Upon accumulating 100 FH or within 

the next 10 FH after the effective date 

of this AD, whichever occurs later 

Table 2 – Twin engine aeroplanes 

Installation and time 

accumulated by the clutch 

Compliance time 

Only a single clutch affected, 

irrespective of time accumulated 

Upon accumulating 100 FH or within 

the next 50 FH after the effective date 

of this AD, whichever occurs later 

Both clutches affected, identify time accumulated for each clutch: 

Clutch with 100 FH or more Before next flight after the effective 

date of this AD (see note below) 

Clutch with less than 100 FH Upon accumulating 100 FH or within 

the next 10 FH after the effective date 

of this AD, whichever occurs later 

Note: A single ferry flight (maximum of 2 FH, under VFR conditions only) is 

allowed to a maintenance facility to accomplish the required clutch assembly 

replacement. 

(2) An engine that is already compliant with EASA AD 2011-0111-E is 

considered to be compliant with the requirements of paragraph (1) this AD, 

provided it can be positively determined that no clutch assembly, having a 

P/N and s/n listed in TAE SB TM TAE 125-0021 Revision 1 (for TAE 125-01 

EASA Form 111 Page 2/3
EASA AD No.: 2011-0152-E 

EASA Form 111 Page 3/3

engines) or in TAE SB TM TAE 125-1011 P1 Revision 1 (for TAE 125-02-

99 engines), both dated 17 August 2011, is installed on that engine. 

(3) From the effective date of this AD, do not install on any aeroplane a 

TAE 125 engine with a P/N 02-7210-11001R13, P/N 05-7211-K006001 or 

P/N 05-7211-K006002 clutch assembly installed, and do not install on any 

TAE 125 engine a P/N 02-7210-11001R13, P/N 05-7211-K006001 or P/N 

05-7211-K006002 clutch assembly, unless it has been verified that the s/n 

of the clutch assembly (to be) installed on the engine is not listed in TAE SB 

TM TAE125-0021 Rev.1 or TAE SB TM TAE 125-1011 P1 Rev.1, as 

applicable to engine model. 

Ref. Publications: TAE SB TM TAE 125-0021 Rev.1 dated 17 August 2011. 

TAE SB TM TAE 125-1011 P1 Rev.1 dated 17 August 2011. 

The use of later approved revisions of these documents 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 Safety Information 

Section, 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 Thielert Aircraft Engines, Platanenstraße 14, 

D-09350 Lichtenstein, Federal Republic Germany 

Telephone +49-37204-696-0, Fax +49-37204-696- 2912, 

E-mail info@centurion-engines.com.