Is AD 2012-04-13 a recurring Airworthiness Directive?

Yes — AD 2012-04-13 requires a repetitive inspection. Next-due depends on the aircraft's time in service.

Which aircraft does AD 2012-04-13 apply to?

AD 2012-04-13 applies to Rolls-Royce Plc — models G2-T-19, G3-T-19, H-T-36, H2-T-19, 553-61, 553A2-61, 556-61, 556A2-61. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2012-04-13

recurring

Official AD 2012-04-13 · FR doc 2012-5370 · 2012-03-07 · turbine engine

Airworthiness Directives; Rolls-Royce plc (RR) Turbofan Engines

What this AD requires

We are superseding an existing airworthiness directive (AD) for all RR model RB211-524G2-T-19, -524G3-T-19, -524H-T-36, and -524H2- T-19; and RB211-Trent 553-61, 553A2-61, 556-61, 556A2-61, 556B-61 556B2-61, 560-61, 560A2-61; RB211-Trent 768-60, 772-60, 772B-60; and RB211-Trent 875-17, 877-17, 884-17, 884B-17, 892-17, 892B-17, and 895- 17 turbofan engines that have a high-pressure (HP) compressor stage 1 to 4 rotor disc with a part number (P/N) listed in Table 1 of the AD. That AD currently requires repetitive inspections of the axial dovetail slots, and follow-on corrective action depending on findings. Since we issued that AD, we determined that the definition of shop visit is too restrictive in the existing AD. This continues to require those repetitive inspections and follow-on corrective actions. This new AD changes the definition of a shop visit to be less restrictive. This AD was prompted by our determination that the definition of "shop visit" in the existing AD is too restrictive, in that it would require operators to inspect more often than required to ensure safety. We are issuing this AD to detect cracks in the HP compressor stage 1 and 2 disc posts, which could result in failure of the disc post and HP compressor blades, release of uncontained engine debris, and damage to the airplane.

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

Which aircraft AD 2012-04-13 applies to

MakesRolls-Royce Plc

ModelsG2-T-19, G3-T-19, H-T-36, H2-T-19, 553-61, 553A2-61, 556-61, 556A2-61, 556B-61, 556B2-61, 560-61, 560A2-61, 768-60, 772-60, 772B-60, 875-17, 877-17, 884-17, 884B-17, 892-17, 892B-17, 895-17, RB211-524, RB211-Trent

Part-conditional — FW20195, FK25502, FW23711, FK30524, FK22745, FK24031, FK26185, FK23313.

Applies only to engines that have a high-pressure (HP) compressor stage 1 to 4 rotor disc with one of the listed part numbers installed; the specific P/N subset applicable is mapped per engine model group in Table 1 of the AD (RB211-524 group uses FW20195/FK25502/FW23711; RB211-Trent 553/556/560 group uses FK30524; RB211-Trent 768/772 group uses FK22745/FK24031/FK26185/FK23313/FK25502/FK32129/FW20195/FW20196/FW20197/FW20638/FW23711; RB211-Trent 875/877/884/892/895 group uses FK24009/FK26167/FK32580/FW11590/FW61622).

Whether AD 2012-04-13 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 2012-04-13 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.