AD 2009-24-10
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Aviat | Various | Airworthiness Directives; Thielert Aircraft Engines GmbH (TAE) Model TAE 125-01 Reciprocating Engines |
Unsafe Condition
In-flight engine shutdown incidents were reported on aircraft equipped with TAE-125-01 engines. This was found to be mainly the result of operation over a long time period with broken piston cooling oil nozzles which caused thermal overload of the piston.
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Required Actions
Inspect the engine and engine oil for any evidence or pieces of broken piston cooling nozzles within the next 110 flight hours or during the next scheduled maintenance, whichever occurs first. Use Thielert Service Bulletin No. TM TAE 125-0017, Revision 2, dated February 22, 2008, for the inspection. Repetitively inspect the engine and engine oil for any evidence or pieces of broken piston cooling nozzles within every additional 100 flight hours. If any evidence of a failed cooling nozzle is found, replace the failed cooling nozzle before further flight.
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Compliance Time
Within 110 flight hours or during the next scheduled maintenance, whichever occurs first after the effective date of this AD.
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Affected Aircraft
Thielert Aircraft Engines GmbH (TAE) model TAE 125-01 reciprocating engines, excluding engines that have been modified to TAE Design Modification No. 2007-001. These engines are installed in, but not limited to, Diamond Aircraft Industries Model DA42, Piper PA-28-61 (STC No. SA03303AT), Cessna 172F, 172G, 172H, 172I, 172K, 172L, 172M, 172N, 172P, 172R, 172S, F172F, F172G, F172H, F172K, F172L, F172M, F172N, and F172P (STC No. SA01303WI) airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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