Airworthiness Directive 2006-17-12
one-timeAirworthiness Directives; Rolls-Royce plc RB211 Series Turbofan Engines
What this AD requires
This amendment supersedes an existing airworthiness directive (AD), that is applicable to Rolls-Royce plc (RR) models RB211-535E4-37, RB211-535E4--37, RB211-535C-37, RB211-535E4-B-75, RB211-535E4-C, and RB211-22B-02 turbofan engines. That AD currently requires inspecting certain high pressure (HP) turbine discs, manufactured between 1989 and 1999, for cracks in the rim cooling air holes, and, if necessary, replacing the discs with serviceable parts. The manufacturer identified reaming-induced machining anomalies (RIMA) as the cause for the cracking. This amendment requires the same inspections, and reduces the compliance times for eddy current inspection (ECI) for the RR RB211- 22B-02 engines. This amendment results from the manufacturer reducing their recommended compliance times for inspections on RB211-22B-02 engines. We are issuing this AD to prevent possible disc failure, which could result in an uncontained engine failure and damage to the airplane.
Which aircraft AD 2006-17-12 applies to
Applies only to turbine discs with part numbers and serial numbers listed in the AD's Tables 1, 3, and 5 (specific numbers not included in the applicability excerpt provided).
Whether AD 2006-17-12 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.