Camshaft Concerns

The following is derived from maintenance facility submissions to the FAA’s Service Difficulty Reports database.

Tuesday, January 16, 2024 at 08:00 AM ET

Verified

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Key Takeaways:

Aircraft experienced a range of camshaft issues including worn, pitted, galled, or abnormally damaged lobes and gear teeth.
Related components such as valve lifters and tappets were also identified as faulty or contributors to camshaft wear.
These issues were often detected during routine maintenance checks (e.g., oil analysis, 100-hour inspections) or manifested as engine performance problems, frequently leading to engine removal for repair.

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Beech A36 Bonanza: Damaged Camshaft Gear Teeth

During climb out, the PIC heard engine noise. At 6000 feet agl, the engine shut down and pilot landed at the nearest airport. A subsequent engine teardown revealed approximately 12 cam gear teeth damaged on p/n 655516A.

Part total time: Unknown