Is AD 2015-18-51 a recurring Airworthiness Directive?

No — AD 2015-18-51 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2015-18-51 apply to?

AD 2015-18-51 applies to Airbus Helicopters — models AS332C, AS332C1, AS332L, AS332L1, AS332. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2015-18-51

one-time

Official AD 2015-18-51 · FR doc 2015-25217 · 2015-10-05 · airframe

Airworthiness Directives; Airbus Helicopters

What this AD requires

We are publishing a new airworthiness directive (AD) for Airbus Helicopters Model AS332C, AS332C1, AS332L, and AS332L1 helicopters, which was sent previously to all known U.S. owners and operators of these helicopters. This AD requires inspecting certain tail rotor (T/R) blades, replacing the set of T/R blades if there is damage, deactivating the rotor de-icing system, revising the rotorcraft flight manual (RFM), and installing a placard. This AD is prompted by a report of a T/R de-icing system power supply box stuck in a "closed" position providing an uncontrolled and un-annunciated power supply to the system. These actions are intended to detect and prevent structural damage to the T/R blades caused by overheating, and subsequent loss of control of the helicopter.

Which aircraft AD 2015-18-51 applies to

MakesAirbus Helicopters

ModelsAS332C, AS332C1, AS332L, AS332L1, AS332

Part-conditional — 204ZP01Y01, 332A12-0055-XX.

Applies only if the tail rotor de-icing installation unit P/N 204ZP01Y01 and the tail rotor blade P/N 332A12-0055-XX (where XX is any dash number) are both installed.

Whether AD 2015-18-51 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 2015-18-51 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.