Is AD 2021-04454 a recurring Airworthiness Directive?

No — AD 2021-04454 is a one-time directive. Verify it was complied with in the aircraft's records.

Airworthiness Directive 2021-04454

Q: Which aircraft does AD 2021-04454 apply to?

AD 2021-04454 applies to Safran Helicopter Engines — models Arriel 1B, Arriel 1C, Arriel 1C2, Arriel 1D1, Astazou XIV B, Astazou XIV H, Arriel, Astazou. Serial/part conditions may narrow it to specific aircraft.

one-time

AD 2021-04454 · 2021-03-05 · turboshaft engine

Airworthiness Directives; Safran Helicopter Engines, S.A. (Type Certificate Previously Held by Turbomeca, S.A.), Turboshaft Engines

What this AD requires

The FAA is adopting a new airworthiness directive (AD) for certain Safran Helicopter Engines, S.A. (Safran Helicopter Engines) Arriel 1B, Arriel 1C, Arriel 1C2, Arriel 1D1, Astazou XIV B, and Astazou XIV H model turboshaft engines. This AD was prompted by the detection of positive segregation (freckles) on Stage 2 high-pressure turbine (HPT) disks and Stage 3 turbine wheels. This AD requires removal from service of certain Stage 2 HPT disks for Safran Helicopter Engines Arriel 1B, 1C, 1C2, and 1D1 model turbofan engines and affected Stage 3 turbine wheels for Safran Helicopter Engines Astazou XIV B and XIV H model turbofan engines. The FAA is issuing this AD to address the unsafe condition on these products.

Which aircraft AD 2021-04454 applies to

MakesSafran Helicopter Engines

ModelsArriel 1B, Arriel 1C, Arriel 1C2, Arriel 1D1, Astazou XIV B, Astazou XIV H, Arriel, Astazou

Serial-conditional — narrows to serials J915AD–J915AD, J918AD–J918AD, J919AD–J919AD, J921AD–J921AD, J923AD–J923AD, J924AD–J924AD, J926AD–J926AD, J927AD–J927AD, J276AD–J276AD, J278AD–J278AD, J279AD–J279AD, J281AD–J281AD, J282AD–J282AD, J283AD–J283AD, J287AD–J287AD.

Part-conditional — 0292250400, 0256257050.

Applies to (1) Arriel 1B, 1C, 1C2, and 1D1 engines with a Stage 2 HPT disk, P/N 0292250400, installed with one of the listed serial numbers, and (2) Astazou XIV B and XIV H engines with a Stage 3 turbine wheel, P/N 0256257050, installed with one of the listed serial numbers.

Whether AD 2021-04454 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 2021-04454 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.