It took a while -- the proposed airworthiness directive was out over a year ago -- but this week, the FAA issued a final rule requiring inspections and compression tests for some 8,000 engines built by Teledyne Continental Motors with cylinders by Superior Air Parts, if they have logged more than 750 flight hours. The FAA said its rule aims to prevent the separation of the cylinder head, which could result in immediate loss of engine power, possible structural damage to the engine, and possible fire in the engine compartment. The cost of compliance is estimated at about $1,550 per airplane. The AD becomes effective Sept. 9. For the full text of the final rule, click here.
The FAA's final rule provides details about several comments that were made and considered, but in the end, no substantial changes were made to the AD as it was originally proposed. The AD affects a wide variety of Cessna and Beechcraft models, as well as a few Bellancas and Navions, and the Rockwell 200D.