AD Issued for Superior Air Parts Cylinders on Continental Engines

The FAA has issued an airworthiness directive, effective Sept. 9, for certain Superior Air Parts “investment cast” cylinder assemblies that have been used by aircraft owners on some Continental IO-520, TSIO-520, and IO-550 engines. It requires initial and repetitive inspections and compression tests to detect cracks in those cylinders with more than 750 flight hours. There have been cracks in the area of the exhaust valve and separation of cylinder heads.

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