FAA orders · airworthiness directive · historical

2011-23-01: Clutch assemblies

FAA order 2011-23-01 is an airworthiness directive in force since November 22, 2011. The FAA's subject line: Clutch assemblies. It names the Thielert TAE-125-01, Thielert TAE 125-02-99 engines: about 78 aircraft on the U.S. register today across them, though an order usually covers particular versions or serial numbers rather than every one. System: engine.

What it applies to as the FAA lists it

Kind of product: Engine
Makes: Thielert Aircraft Engines GmbH
Models: TAE 125-01, TAE 125-02-99
Engine series: Thielert TAE-125-01 35 aircraft
Thielert TAE 125-02-99 43 aircraft

Dates and paperwork

In force since: November 22, 2011
Published: November 7, 2011 (signed October 19, 2011)
Docket: FAA-2010-0683
Replaces: 2010-18-02
Replaced by: 2015-02-01
Status: Historical
The FAA's document: Read the order on the FAA's site

The FAA's summary their words, unchanged

We are superseding an existing airworthiness directive (AD) for Thielert Aircraft Engines GmbH (TAE) Models TAE 125-01 and TAE 125- 02-99 reciprocating engines. That AD currently requires replacement of certain part numbers (P/Ns) and serial numbers (S/Ns) of clutch assemblies due to clutch failure. The failures identified above could lead to engine in-flight shutdown and loss of control of the airplane. This AD requires the same actions, but applies the corrective action to an additional 244 affected clutch assemblies. This AD was prompted by TAE identifying additional clutch assemblies with nonconforming disc springs. We are issuing this AD to correct the unsafe condition on these products.

The order itself the regulatory text, as published

Show the full text (4,430 characters)

Adoption of the Amendment 

	Accordingly, under the authority delegated to me by the Administrator, the FAA amends 14 CFR part 39 as follows: 

[[Page 68638]] 

PART 39--AIRWORTHINESS DIRECTIVES 

0 1. The authority citation for part 39 continues to read as follows: 

	Authority:  49 U.S.C. 106(g), 40113, 44701. 

Sec.  39.13  [Amended] 

0 2. The FAA amends Sec.  39.13 by removing airworthiness directive (AD) 2010-18-02, Amendment 39-16415 (75 FR 52240, August 25, 2010), and adding the following new AD: 

2011-23-01 Thielert Aircraft Engines GmbH: Amendment 39-16852; Docket No. FAA-2010-0683; Directorate Identifier 2010-NE-25-AD. 

(a) Effective Date 

	This AD is effective November 22, 2011. 

(b) Affected ADs 

	This AD supersedes AD 2010-18-02, Amendment 39-16415, (75 FR 52240, August 25, 2010). 

(c) Applicability 

	This AD applies to Thielert Aircraft Engines GmbH (TAE): 
	(1) TAE 125-01 reciprocating engines (commercial designation Centurion 1.7), all serial numbers (S/Ns), if a clutch assembly part number (P/N) 02-7210-11001R13 is installed, and 
	(2) TAE 125-02-99 reciprocating engines (commercial designation Centurion 2.0), all S/Ns, if a clutch assembly P/N 05-7211-K006001 or P/N 05-7211-K006002 is installed. 

(d) Unsafe Condition 

	This AD was prompted by TAE identifying additional clutch assemblies that could fail with nonconforming disc springs. These failures could lead to engine in-flight shutdown and loss of control of the airplane. We are issuing this AD to correct the unsafe condition on these products. 

(e) Actions and Compliance 

	Unless already done, do the following actions. 
	(1) After the effective date of this AD, for clutch assembly P/N 02-7210-11001R13, P/N 05-7211-K006001 and P/N 05-7211-K006002, with an S/N listed in TAE Service Bulletin (SB) No. TM TAE 125-0021, Revision 1, dated August 17, 2011, or SB No. TM TAE 125-1011 P1, Revision 2, dated August 31, 2011, do the following: 
	(i) For engines with affected clutch assemblies that have accumulated 100 flight hours or more on the effective date of this AD, replace the clutch assembly before further flight. 
	(ii) For engines with affected clutch assemblies that have accumulated less than 100 flight hours on the effective date of this AD, replace the clutch assembly before accumulating 100 flight hours. 
	(2) After the effective date of this AD: 
	(i) Do not install an engine having a clutch assembly that is listed by S/N in TAE SB No. TM TAE 125-0021, Revision 1, dated August 17, 2011, or SB No. TM TAE 125-1011 P1, Revision 2, dated August 31, 2011, and 
	(ii) Do not install any clutch assembly listed by S/N in TAE SB No. TM TAE 125-0021, Revision 1, dated August 17, 2011, or SB No. TM TAE 125-1011 P1, Revision 2, dated August 31, 2011, into any engine. 

(f) Alternative Methods of Compliance (AMOCs) 

	The Manager, Engine Certification Office, FAA, may approve AMOCs to this AD. Use the procedures found in 14 CFR 39.19 to make your request. 

(g) Related Information 

	(1) Refer to MCAI EASA AD 2011-0152-E, dated August 18, 2011, for related information. 
	(2) Contact Alan Strom, Aerospace Engineer, Engine Certification Office, FAA, Engine & Propeller Directorate, 12 New England Executive Park, Burlington, MA 01803; email: [email protected]; phone: (781) 238-7143; fax: (781) 238-7199, for more information about this AD. 

(h) Material Incorporated by Reference 

	(1) You must use Thielert Aircraft Engines GmbH Service Bulletin No. TM TAE 125-0021, Revision 1, dated August 17, 2011, and Service Bulletin No. TM TAE 125-1011 P1, Revision 2, dated August 31, 2011, to identify the affected clutch assemblies requiring replacement by this AD. 
	(2) The Director of the Federal Register approved the incorporation by reference of this service information under 5 U.S.C. 552(a) and 1 CFR part 51. 
	(3) For service information identified in this AD, contact Thielert Aircraft Engines GmbH, Platanenstrasse 14 D-09350, Lichtenstein, Germany; phone: +49-37204-696-0; fax: +49-37204-696- 55; email: engines.com">[email protected]. 
	(4) You may review copies at the FAA, New England Region, 12 New England Executive Park, Burlington, MA; or at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call (202) 741-6030, or go to: http:[sol][sol]www.archives.gov/federal-register/cfr/ibr- locations.html.

Source: FAA Dynamic Regulatory System, airworthiness directives. The FAA's document is the authority; the register counts are this site's, from the FAA register of October 23, 2026. Connections as data: /graph/directive/2011-23-01.json · aircraft systems.