Airworthiness Directives; Pratt & Whitney JT8D Series Turbofan Engines

This amendment adopts a new airworthiness directive (AD), that is applicable to Pratt & Whitney (PW) JT8D series turbofan engines. This amendment requires removing certain 2nd stage compressor disks, specified by part number (P/N) and serial number (SN), from service. This amendment is prompted by a report from PW of a number of JT8D engine 2nd stage compressor disks that were delivered to the field with potential machining damage to the tie rod, counterweight, and pin holes. The actions specified by this AD are intended to prevent rupture of the 2nd stage compressor disk caused by machining damage, which could result in an uncontained engine failure and damage to the airplane.