Airworthiness Directive 2017-10-25
one-timeAirworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG Turbofan Engines
What this AD requires
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.
Which aircraft AD 2017-10-25 applies to
Applies to engines with high-pressure compressor (HPC) stage 12 rotor disks, P/N EU25917, P/N EU56963, P/N JR10242, or P/N JR18449, installed.
Whether AD 2017-10-25 actually applies to your aircraft (by serial and installed parts) and whether it’s already complied with comes from that aircraft’s records.
How AD compliance is recorded
A valid compliance record (14 CFR 43.9) states:
Tailplate reads a tail number’s logbooks and matches every applicable AD — including this one — to its compliance evidence, with recurring next-due dates computed.
Look up a tail number →Read the full directive (Federal Register)Applicability is derived from the FAA directive corpus and is advisory, not a legal airworthiness determination. Compliance is established only from an aircraft’s actual records.