Is AD 2012-19-09 a recurring Airworthiness Directive?

No — AD 2012-19-09 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2012-19-09 apply to?

AD 2012-19-09 applies to Eurocopter — models EC155B, EC155B1, SA-365N1, AS-365N2, AS 365 N3, EC155, SA-365, AS-365. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2012-19-09

one-time

Official AD 2012-19-09 · FR doc 2012-23448 · 2012-09-25 · airframe

Airworthiness Directives; Eurocopter France Helicopters

What this AD requires

We are adopting a new airworthiness directive (AD) for Eurocopter France (Eurocopter) Model EC 155B, EC155B1, SA-365N1, AS- 365N2 and AS 365 N3 helicopters to require visually inspecting the tail rotor hub (TRH) for a crack and removing the TRH if a crack exists. This AD is prompted by reports of cracks on two TRHs. These actions are intended to prevent the tail rotor from jamming, which could lead to reduced or loss of control of the helicopter.

Which aircraft AD 2012-19-09 applies to

MakesEurocopter

ModelsEC155B, EC155B1, SA-365N1, AS-365N2, AS 365 N3, EC155, SA-365, AS-365

Part-conditional — 365A33351100, 365A33351101, 365A33351102.

Applies only to helicopters with tail rotor hub (TRH) P/N 365A33351100, 365A33351101, or 365A33351102 installed.

Whether AD 2012-19-09 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 2012-19-09 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.