AD 2015-02-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron Lycoming Division | Various | Airworthiness Directives; Lycoming Engines Reciprocating Engines (Type Certificate previously held by Textron Lycoming Division, AVCO Corporation) |
| aircraft | Textron | Lycoming Division | Airworthiness Directives; Lycoming Engines Reciprocating Engines (Type Certificate previously held by Textron Lycoming Division, AVCO Corporation) |
| engine | Lycoming | Engines Reciprocating | Airworthiness Directives; Lycoming Engines Reciprocating Engines (Type Certificate previously held by Textron Lycoming Division, AVCO Corporation) |
Unsafe Condition
Propeller governor shaft set screws coming loose due to improper installation.
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Required Actions
At each installation of the propeller governor shaft set screw, secure the set screw in place in accordance with Lycoming Engines Service Instruction No. 1343B, dated June 15, 2007. Use a thread-locking, anaerobic, single-component sealing compound that meets military specification Mil-S-46163A, Type III, Grade R, and peen the crankcase hole threads.
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Compliance Time
Within the compliance times specified in the AD, unless already done.
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Affected Aircraft
All Lycoming Engines wide deck aerobatic reciprocating engines with an 'A' or 'E' at the end of the serial number and equipped with a front-mounted propeller governor. Affected models include, but are not limited to, AEIO-320-D1B, AEIO-360-A1E, -A1E6, -B1H, -H1B, AEIO-540-D4A5, -D4B5, -D4D5, -L1B5, -L1B5D, -L1D5, AEIO-580-B1A, and IO-540-K1K5 (with aerobatic kit installed).
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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