AD 2017-10-25
Effective 06/12/2017 · Published 05/26/2017
Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG Turbofan Engines
Summary
We are adopting a new airworthiness directive (AD) for all Rolls-Royce Deutschland Ltd & Co KG (RRD) model Spey 506-14A, Spey 555- 15, Spey 555-15H, Spey 555-15N, and Spey 555-15P turbofan engines. This AD requires reducing the maximum approved life limits for certain high- pressure compressor (HPC) stage 12 rotor disks. We are issuing this AD to correct the unsafe condition on these products.