EASA AD No.: 2014-0232

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EASA AIRWORTHINESS DIRECTIVE

AD No.: 2014-0232

[Correction: 04 November 2014]

Date: 22 October 2014

Note: This 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 EU 748/2012, Part 21.A.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].

Design Approval Holder’s Name:

TECHNIFY MOTORS GmbH

Type/Model designation(s):

TAE 125 engines

TCDS Number: EASA.E.055

Foreign AD: Not applicable

Supersedure: This AD supersedes EASA AD 2011-0152-E dated 18 August 2011.

ATA 72 Engine – Clutch Assembly – Identification / Replacement

Manufacturer(s): Technify Motors GmbH (TMG), formerly 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) 02-7210-11001R11 or 

P/N 02-7210-11001R11-AT or P/N 02-7210-11001R13 is installed, and

TAE 125-02-99 (commercial designation CD-135, formerly 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.
EASA AD No.: 2014-0232

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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.

Thereafter, TAE identified further affected clutch assemblies and EASA issued 

AD 2011-0152-E, which superseded AD 2010-0111-E, to extend the 

applicability to those clutch assemblies.

Since that AD was issued, Technify Motors (formerly TAE) has found some 

additional disk springs in clutches that did not get proper heat treatment. The

disk springs do not provide sufficient strength over the anticipated life, and the 

clutch can slip (interrupting power supply from the core engine to the propeller).

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

AD 2011-0152-E, which is superseded, and extends the applicability to include 

other affected clutch assemblies.

This AD is re-published to correct typos in the clutch assembly P/N in Table 1.

Effective Date: 05 November 2014

Required Action(s) 

and Compliance

Time(s):

Required as indicated, unless accomplished previously:

(1) Identify, as follows, the serial number (s/n) of each clutch assembly 

P/N 02-7210-11001R11, P/N 02-7210-11001R11-AT, P/N 02-7210-

11001R13, P/N 05-7211-K006001 and P/N 05-7211-K006002 installed 

on the engine and, if the s/n of a clutch matches one of those listed in TAE 

SB TM TAE 125-0021 Rev. 2 (for TAE 125-01 engines) or in TAE SB TM 

TAE 125-1011 P1 Rev. 2 (for TAE 125-02-99 engines), as applicable to 

engine model, within the compliance time specified in Table 1 of this AD, 

as applicable, replace the clutch assembly with a serviceable part in 

accordance with the instructions of TAE SB TM TAE 125-0021 Rev. 2 or 

TAE SB TM TAE 125-1011 P1 Rev. 2.

(1.1) For P/N 02-7210-11001R13, P/N 05-7211-K006001 and 

P/N 05-7211-K006002 clutch assemblies: Before next flight after 

22 August 2011 [the effective date of EASA AD 2011-0152-E].

(1.2) For P/N 02-7210-11001R11and P/N 02-7210-11001R11-AT clutch 

assemblies: Within 30 days after the effective date of this AD.

Table 1 – Replacement of clutch assemblies

Clutch 

assembly P/N

Time accumulated 

by the clutch

Compliance time

02-7210-

11001R13,

05-7211-

K006001,

05-7211-

K006002

100 flight hours 

(FH) or more

Before next flight after 

22 August 2011 [the effective 

date of EASA AD 2011-0152-E] 

(see Note 2 below)

Less than 100 FH Upon accumulating 100 FH or 

within the next 10 FH after 

22 August 2011 [the effective 

date of EASA AD 2011-0152-E], 

whichever occurs later

02-7210-

11001R11,

02-7210-

11001R11-AT

100 FH or more Within 30 days after the effective 

date of this AD 

Less than 100 FH Upon accumulating 100 FH or 

within the next 10 FH after the 

effective date of this AD, 

whichever occurs later
EASA AD No.: 2014-0232

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Note 1: For twin-engine aeroplanes with only one engine affected, irrespective of 

the time accumulated by the clutch, a grace period of 50 FH may be applied to 

the compliance time for replacement defined in Table 1 of this AD.

Note 2: 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) Replacement of a clutch assembly on an engine, accomplished before the 

effective date of this AD in accordance with the instructions of TAE SB 

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

applicable, is acceptable to comply with the requirements of paragraph (1) 

of this AD for that engine, 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 

Rev. 2 or TAE SB TM TAE 125-1011 P1 Rev. 2 is currently installed on 

that engine.

(3) From the effective date of this AD, it is allowed to install on an aeroplane a

TAE 125 engine with a P/N 02-7210-11001R11, P/N 02-7210-11001R11-

AT, P/N 02-7210-11001R13, P/N 05-7211-K006001 or P/N 05-7211-

K006002 clutch assembly installed, and to install on a TAE 125 engine a 

P/N 02-7210-11001R11, P/N 02-7210-11001R11-AT, P/N 02-7210-

11001R13, P/N 05-7211-K006001 or P/N 05-7211-K006002 clutch 

assembly, provided 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.2 or TAE SB TM TAE 125-1011 P1 Rev.2, as applicable to engine 

model.

Ref. Publications: TAE SB TM TAE 125-0021 Rev.1 dated 17 August 2011 or Rev. 2 dated 

13 October 2014.

TAE SB TM TAE 125-1011 P1 Rev.1 dated 17 August 2011 or Rev. 2 dated 

31 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. Based on the required actions and the compliance time, EASA have 

decided to issue a Final AD with Request for Comments, postponing the 

public consultation process until after publication.

3. Enquiries regarding this AD should be referred to the Safety Information 

Section, Certification Directorate, EASA. E-mail: ADs@easa.europa.eu.

4. For any question concerning the technical content of the requirements in 

this AD, please contact:

Technify Motors GmbH, Platanenstraße 14,

D-09356 Sankt Egidien, Germany

Telephone: +49-37204-696-0; Fax: +49-37204-696-55;

E-mail: info@centurion.aero.