Summary
This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain Superior Air Parts, Inc. pistons installed on Teledyne Continental Motors O-470 series reciprocating engines. This proposal would require removal from service of certain pistons. This proposal is prompted by reports of piston failures. The actions specified by the proposed AD are intended to [[Page 9801]] prevent piston failure, which can result in engine power loss, engine failure and loss of the aircraft.