Is AD 2018-07541 a recurring Airworthiness Directive?

No — AD 2018-07541 is a one-time directive. Verify it was complied with in the aircraft's records.

Airworthiness Directive 2018-07541

Q: Which aircraft does AD 2018-07541 apply to?

AD 2018-07541 applies to Safran Helicopter Engines — models Arrius 2B1, Arrius 2B1A, Arrius 2B2, Arrius 2K1, Arrius. Serial/part conditions may narrow it to specific aircraft.

one-time

AD 2018-07541 · 2018-04-12 · turboshaft engine

Airworthiness Directives; Safran Helicopter Engines, S.A., Turboshaft Engines

What this AD requires

We are adopting a new airworthiness directive (AD) for certain Safran Helicopter Engines, S.A., Arrius 2B1, 2B1A, 2B2, and 2K1 turboshaft engines. This AD requires inspecting the power turbine wheel (PTW) assembly and replacing the PTW if the turbine blade dampers are found missing. This AD was prompted by the manufacturer reporting a number of PTW assemblies may have been assembled without the blade dampers. We are issuing this AD to address the unsafe condition on these products.

Which aircraft AD 2018-07541 applies to

MakesSafran Helicopter Engines

ModelsArrius 2B1, Arrius 2B1A, Arrius 2B2, Arrius 2K1, Arrius

Applies to engines with a power turbine wheel (PTW) assembly having a serial number listed in Appendix 2.1 of Safran Helicopter Engines Mandatory Service Bulletin (MSB) No. A319 72 2854, Version A, dated February 9, 2018.

Whether AD 2018-07541 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 2018-07541 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.