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Airworthiness Directive 2013-04-01

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Official AD 2013-04-01 · FR doc 2013-03708 · 2013-02-21 · 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) RB211-524 series turbofan engines. That AD currently requires removal and repair of certain thrust reverser units (TRUs) prior to reinstallation. This AD requires the same actions for an expanded population of TRUs and extends the compliance time for repairing certain TRUs. This AD was prompted by additional engineering evaluation of TRUs, as a result of a translating cowl gearbox stubshaft failure and subsequent repair. We are issuing this AD to prevent failure of the attachment rivets, which may result in release of the TRU from the engine.

Which aircraft AD 2013-04-01 applies to

MakesRolls-Royce Plc
ModelsRB211-524D4-19, RB211-524D4-B-19, RB211-524D4-39, RB211-524D4-B-39, RB211-524D4X-19, RB211-524D4X-B-19, RB211-524H-36, RB211-524H2-19, RB211-524H-T-36, RB211-524H2-T-19, RB211-524G2-19, RB211-524G3-19, RB211-524G2-T-19, RB211-524G3-T-19, RB211-524D4, RB211-524D4-B, RB211-524D4X, RB211-524D4X-B, RB211-524H, RB211-524H2, RB211-524H-T, RB211-524H2-T, RB211-524G2, RB211-524G3, RB211-524G2-T, RB211-524G3-T

Applies only to engines with thrust reverser units (TRUs) having a part number specified in paragraph 1.A. of RR Alert Non-Modification Service Bulletin No. RB.211-78-AG084, Revision 7, dated November 23, 2012, installed.

Whether AD 2013-04-01 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 2013-04-01 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.