Is AD 2015-05-51 a recurring Airworthiness Directive?

No — AD 2015-05-51 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2015-05-51 apply to?

AD 2015-05-51 applies to Agusta — models A109A, A109A II, A109. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2015-05-51

one-time

Official AD 2015-05-51 · FR doc 2015-14415 · 2015-06-16 · airframe

Airworthiness Directives; Agusta S.p.A. (Agusta) Helicopters

What this AD requires

We are publishing a new airworthiness directive (AD) for Agusta Model A109A and A109A II helicopters, which was sent previously to all known U.S. owners and operators of these helicopters. This AD requires replacing a certain part-numbered blade with an approved part- numbered blade. This AD is prompted by an error in the Illustrated Parts Catalog (IPC) that incorrectly allows installation of a certain part-numbered blade on the affected helicopters. These actions are intended to prevent blade failure and subsequent loss of control of the helicopter.

Which aircraft AD 2015-05-51 applies to

MakesAgusta

ModelsA109A, A109A II, A109

Serial-conditional — narrows to serials 7154–7255.

Part-conditional — 109-0103-01-7.

Applies to Model A109A helicopters, S/N 7154 through 7255 (serial range applies to A109A only), and all Model A109A II helicopters (all S/N), with a main rotor blade P/N 109-0103-01-7 installed.

Whether AD 2015-05-51 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 2015-05-51 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.