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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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Key Takeaways:

  • Multiple incidents across various aircraft types indicate a recurring problem with camshafts, camshaft gears, lobes, and related components exhibiting premature wear or damage.
  • Detection methods for these issues vary, ranging from engine performance anomalies (noise, shutdown, low RPM) to routine inspections and critical findings from oil analysis and filter checks (e.g., excessive ferrous metal).
  • The incidents highlight the importance of vigilant maintenance, especially regular oil analysis and oil filter inspections, as they often provide crucial early indicators of internal engine wear.
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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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