Bendix Magneto Broken Gear Teeth Two different Cirrus SR22 aircraft (powered by Continental IO-550-N27 engines) were discovered by the same shop to have broken magneto gear teeth. The first instance was discovered as a result of engine 288
Engines And Accessories
Two different Cirrus SR22 aircraft (powered by Continental IO-550-N27 engines) were discovered by the same shop to have broken magneto gear teeth. The first instance was discovered as a result of engine roughness during a pre-takeoff engine run-up: The l/h magneto was not firing properly and, upon inspection, the distributor gear (p/n: 10-357586) was found to be missing approximately ten teeth. The second instance was discovered during a routine 500-hour inspection. There was no pre-inspection indication of a problem with the magneto.
Key Takeaways:
- The article reports multiple critical mechanical failures in aircraft components, including recurring issues such as broken Bendix magneto gear teeth and sheared Kelly fuel pump drive shafts.
- Several failures, including the fuel pumps (average 77.7 hours) and a cracked Continental cylinder (368.9 hours), occurred at relatively low operating times, with some discovered during routine inspections without prior symptoms.
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