Is AD 2018-21-12 a recurring Airworthiness Directive?

No — AD 2018-21-12 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2018-21-12 apply to?

AD 2018-21-12 applies to General Electric Company — models GEnx-2B67, GEnx-2B67B, GEnx-2B67/P, GEnx. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2018-21-12

one-time

Official AD 2018-21-12 · FR doc 2018-26038 · 2018-11-30 · turbine engine

Airworthiness Directives; General Electric Company Turbofan Engines

What this AD requires

We are adopting a new airworthiness directive (AD) for certain General Electric Company (GE) GEnx-2B67, -2B67B, and -2B67/P turbofan engines. This AD was prompted by low-cycle fatigue (LCF) cracking of the fuel manifold leading to an engine fire. This AD requires removal from service of certain fuel manifolds at the next engine shop visit and their replacement with parts eligible for installation. We are issuing this AD to address the unsafe condition on these products.

Which aircraft AD 2018-21-12 applies to

MakesGeneral Electric Company

ModelsGEnx-2B67, GEnx-2B67B, GEnx-2B67/P, GEnx

Part-conditional — 2419M11G01, 2561M11G01, 2546M11G01, 2419M12G01, 2561M12G01, 2546M12G01.

Applies only to engines with top main fuel manifold P/N 2419M11G01, 2561M11G01, or 2546M11G01, or lower fuel manifold P/N 2419M12G01, 2561M12G01, or 2546M12G01, installed.

Whether AD 2018-21-12 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:

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 2018-21-12 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.