Summary
This document proposes the adoption of a new airworthiness directive (AD) that is applicable to AlliedSignal Inc. oil scavenge pumps, Part Numbers (P/Ns) 101633-01 and -02 and Rajay Inc. oil scavenge pumps, P/Ns 1025-1 and -2. This proposal would require initial and repetitive inspections of the oil scavenge pump for the security of the snap ring installation, snap ring and washer wear, and shaft groove wear, and replacement, if necessary, with serviceable parts. This proposal is prompted by reports of severe wear on the end plate of the oil scavenge pump. The actions specified by the proposed AD are intended to prevent oil scavenge pump snap ring failure causing severe wear on the pump end plate, which could result in loss of engine oil and subsequent engine shutdown.