Is AD 2021-14520 a recurring Airworthiness Directive?

Yes — AD 2021-14520 requires a repetitive inspection. Next-due depends on the aircraft's time in service.

Airworthiness Directive 2021-14520

Q: Which aircraft does AD 2021-14520 apply to?

AD 2021-14520 applies to Safran Helicopter Engines — models Arriel 2B, Arriel 2B1, Arriel 2C, Arriel 2C1, Arriel 2C2, Arriel 2S1, Arriel 2S2, Arriel. Serial/part conditions may narrow it to specific aircraft.

recurring

AD 2021-14520 · 2021-07-09 · 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 2B, 2B1, 2C, 2C1, 2C2, 2S1 and 2S2 model turboshaft engines. This AD was prompted by reports of non-conforming fuel filter pre- blockage pressure switches. This AD requires repetitive visual inspections of the fuel filter by-pass indicator pop-up, a one-time operational test of the fuel filter pre-blockage pressure switch and, depending on the findings, replacement of the fuel filter pre-blockage pressure switch with a part eligible for installation. The FAA is issuing this AD to address the unsafe condition on these products.

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 2021-14520 applies to

MakesSafran Helicopter Engines

ModelsArriel 2B, Arriel 2B1, Arriel 2C, Arriel 2C1, Arriel 2C2, Arriel 2S1, Arriel 2S2, Arriel

Serial-conditional — narrows to serials 00001–12753, A0001–A0247.

Part-conditional — 9 550 17 200 0.

Applies only to engines with a fuel filter pre-blockage pressure switch, P/N 9 550 17 200 0, within the listed serial number ranges, installed.

Whether AD 2021-14520 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 2021-14520 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.