Rolls-Royce Issues Airworthiness Directive for Spey 555-15, -15H, -15N, and -15P Turbofan Engines

Summary

The Federal Aviation Administration (FAA) has adopted a new airworthiness directive (AD) requiring Rolls-Royce (RR) to modify the low pressure (LP) turbine stage 2 nozzle guide vane (NGV) support ring seal assembly on Spey 555-15, -15H, -15N, and -15P turbofan engines to prevent damage to the disk drive arm, which could lead to loss of engine functionality, turbine overspeed, and potential uncontained disk failure.