Is AD 2018-16-08 a recurring Airworthiness Directive?

No — AD 2018-16-08 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2018-16-08 apply to?

AD 2018-16-08 applies to Leonardo S.P.A. — models A109E, A109S, AW109SP, A109, AW109. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2018-16-08

one-time

Official AD 2018-16-08 · FR doc 2018-16496 · 2018-08-03 · airframe

Airworthiness Directives; Leonardo S.p.A. Helicopters (Type Certificate Previously Held By Finmeccanica S.p.A., AgustaWestland S.p.A)

What this AD requires

We are adopting a new airworthiness directive (AD) for Leonardo S.p.A. (Leonardo) Model A109E, A109S, and AW109SP helicopters with an oil cooler fan assembly (fan assembly) installed. This AD requires inspecting each oil cooler system pulley assembly (pulley assembly) bearing and replacing each fan assembly. This AD is prompted by reports of degraded pulley assembly bearings. The actions of this AD are intended to correct an unsafe condition on these products.

Which aircraft AD 2018-16-08 applies to

MakesLeonardo S.P.A.

ModelsA109E, A109S, AW109SP, A109, AW109

Part-conditional — 109-0455-01-103.

Applies only to helicopters with an oil cooler fan assembly (fan assembly) P/N 109-0455-01-103 installed.

Whether AD 2018-16-08 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 2018-16-08 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.