AD 2008-22-23: Thielert Aircraft Engines GmbH (TAE) Model TAE 125-02-99 Reciprocating Engines

This AD applies to Thielert Aircraft Engines GmbH (TAE) model TAE 125-02-99 reciprocating engines with clutch, part number (P/N) 05-7211-K000304, installed. These engines are installed on, but not limited to, Cessna 172 and (Reims-built) F172 series (STC No. SA01303WI); and Diamond DA42 airplanes. Reason ``(d) In-flight engine shutdown incidents have been reported on aircraft equipped with TAE 125-02-99 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.'' We are issuing this AD to prevent engine in-flight shutdown and the subsequent loss of control of the airplane. Actions and Compliance (e) Unless already done, do the following actions. (1) For engines that have accumulated, on the effective date of this AD, less than 50 flight hours (FH) since installing clutch, P/N 05-7211-K000304: Upon the accumulation of 50 FH since installing clutch, P/N 05-7211-K000304, replace the clutch as specified in TAE SB TM TAE 125-1006 P1, Revision 1, dated May 30, 2008. (2) For engines that have…