Is AD 2016-12-51 a recurring Airworthiness Directive?

No — AD 2016-12-51 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2016-12-51 apply to?

AD 2016-12-51 applies to Airbus Helicopters — models AS332L2, EC225LP, AS332, EC225. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2016-12-51

one-time

Official AD 2016-12-51 · FR doc 2016-15624 · 2016-07-05 · airframe

Airworthiness Directives; Airbus Helicopters

What this AD requires

We are publishing a new airworthiness directive (AD) for Airbus Helicopters Model AS332L2 and Model EC225LP helicopters, which was sent previously to all known U.S. owners and operators of these helicopters. This AD immediately prohibits flight of all Model AS332L2 and EC225LP helicopters. This AD is prompted by an accident involving an EC225LP helicopter in which the main rotor hub (MRH) detached from the main gearbox (MGB). These actions are intended to prevent failure of the main rotor system and subsequent loss of control of the helicopter.

Which aircraft AD 2016-12-51 applies to

MakesAirbus Helicopters

ModelsAS332L2, EC225LP, AS332, EC225

Whether AD 2016-12-51 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 2016-12-51 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.