EASA AD No.: 2012-0116

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EASA AIRWORTHINESS DIRECTIVE

AD No.: 2012-0116

Date: 03 July 2012

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 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].

Design 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 AD 2010-0137 dated 30 June 2010.

ATA 73

Engine Fuel & Control – Full-Authority Digital Engine Control

(FADEC) Software – Modification

Manufacturer(s): Thielert Aircraft Engines GmbH (TAE)

Applicability: TAE 125-01 (commercial designation Centurion 1.7), TAE 125-02-99 

(commercial designation Centurion 2.0) and TAE 125-02-114 (commercial 

designation Centurion 2.0S) engines, all serial numbers.

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: EASA have received reports of possible power loss on aeroplanes equipped 

with TAE 125 engines. The preliminary investigation results have shown that 

an undetected engine overspeed, due to a slipping clutch, may have 

contributed to these occurrences, in combination with other circumstances.

To prevent flights with a deteriorating clutch, TAE have improved the software 

mapping to detect overspeed events and trigger the indication of a permanent 

electronic control unit (ECU) caution at an earlier stage when significant engine 

power is still available.

For the reasons described above, this AD requires the installation of the 

improved software mapping version, as applicable to engine Model.

Effective Date: 10 July 2012
EASA AD No.: 2012-0116

CAP.00110-001 © European Aviation Safety Agency. All rights reserved. 2/2

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Required Action(s) 

and Compliance 

Time(s):

Required as indicated, unless accomplished previously:

Within 55 flight hours, or within 3 months, or during the next scheduled engine 

maintenance, whichever occurs first after the effective date of this AD, modify 

the engine FADEC installation by installing the improved software version 292 

(TAE 125-01), version 301 (TAE 125-02-99), or version 302 (TAE 125-02-114), 

as applicable to engine model:

- For TAE 125-01 engines: in accordance with the instructions of Annex 13 

»FADEC Software Update« of the Operation & Maintenance Manual OM-02-01 

Issue 3 Revision 16.

- For TAE 125-02-99 and TAE 125-02-114 engines: in accordance with the 

instructions of Annex 17 »FADEC Software Update« of the Operation &

Maintenance Manual OM-02-02 Issue 2 Revision 8.

Ref. Publications: TAE SB TM TAE 000-0007 Revision 18 dated 18 June 2012.

Operation & Maintenance Manual OM-02-01 Issue 3 Revision 16 dated 05 

May 2012.

Operation & Maintenance Manual OM-02-02 Issue 2 Revision 8 dated 04 May

2012.

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, 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 GmbH

Platanenstraße 14

D-09350 Lichtenstein, Germany

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

E-mail info@centurion-engines.com.