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Camshaft Concerns

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

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Gemini Sparkle

Key Takeaways:

  • Multiple aircraft experienced camshaft-related failures, including damaged gears, worn lobes, pitting, and faulty lifters, which led to engine issues or shutdowns.
  • These critical component failures were identified through various methods such as in-flight incidents, routine inspections (e.g., 100-hour, oil analysis, oil filter checks), and ground checks.
  • The widespread camshaft damage across different aircraft models frequently necessitated engine removal for repair due to the severity of the wear or failure.
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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

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