Is AD 2012-18-07 a recurring Airworthiness Directive?

Yes — AD 2012-18-07 requires a repetitive inspection every 10 months. Next-due depends on the aircraft's time in service.

Which aircraft does AD 2012-18-07 apply to?

AD 2012-18-07 applies to Rolls-Royce Plc — models 875-17, 877-17, 884-17, 884B-17, 892-17, 892B-17, 895-17, RB211-Trent. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2012-18-07

recurring

Official AD 2012-18-07 · FR doc 2012-23442 · 2012-09-24 · turbine engine

Airworthiness Directives; Rolls-Royce plc Turbofan Engines

What this AD requires

We are superseding an existing airworthiness directive (AD) for all Rolls-Royce plc (RR) RB211-Trent 875-17, RB211-Trent 877-17, RB211-Trent 884-17, RB211-Trent 884B-17, RB211-Trent 892-17, RB211- Trent 892B-17, and RB211-Trent 895-17 turbofan engines. That AD currently requires initial and repetitive ultrasonic inspections (UIs) of certain low-pressure (LP) compressor blades identified by serial number (S/N). This new AD requires the same actions but expands the population of blades. This AD was prompted by the need to add the inspections of the LP compressor blades listed by S/N in Appendices 3H through 3L of RR plc Alert Service Bulletin (ASB) No. RB.211-72-AG244, Revision 4, dated December 22, 2011. We are issuing this AD to prevent multiple LP compressor blades from failing due to blade root cracks, which could lead to uncontained engine failure and damage to the airplane.

Repetitive inspection. Re-inspect every 10 months. The next-due date/hours depend on this aircraft’s time in service — a records report computes it from the logbooks.

Which aircraft AD 2012-18-07 applies to

MakesRolls-Royce Plc

Models875-17, 877-17, 884-17, 884B-17, 892-17, 892B-17, 895-17, RB211-Trent

Applies to the specific low-pressure (LP) compressor blade serial numbers listed in Appendices 3H through 3L of Rolls-Royce plc Alert Service Bulletin (ASB) No. RB.211-72-AG244, Revision 4, dated December 22, 2011.

Whether AD 2012-18-07 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:

Method of compliance — The specific action taken (inspected, replaced, modified) and to what revision.

Date — When the work was done.

Aircraft time — Total time in service / tach at compliance — how recurring next-due is computed.

Signature & certificate — The A&P/IA who returned it to service, with certificate number.

Is AD 2012-18-07 complied with on your aircraft?

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.