Is AD 2012-23-13 a recurring Airworthiness Directive?

No — AD 2012-23-13 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2012-23-13 apply to?

AD 2012-23-13 applies to Sikorsky — models S-70, S-70A, S-70C. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2012-23-13

one-time

Official AD 2012-23-13 · FR doc 2012-28427 · 2012-11-29 · airframe

Airworthiness Directives; Sikorsky Aircraft Corporation (Sikorsky) Model Helicopters

What this AD requires

We are adopting a new airworthiness directive (AD) for Sikorsky Model S-70, S-70A, and S-70C helicopters, which are restricted category helicopters derived from the military Model UH-60 helicopter. This AD would require reducing or establishing life limits for certain listed helicopter parts. This AD is prompted by a review of the United States Army's analysis of their Model UH-60 fleet, which determined it necessary to establish or reduce the life limits of certain parts. The actions are intended to prevent fatigue failure of a part and subsequent loss of control of the helicopter.

Which aircraft AD 2012-23-13 applies to

MakesSikorsky

ModelsS-70, S-70A, S-70C

Applies due to fatigue life limits on main rotor blade, tail rotor blade, planetary carrier assembly, tail rotor servo, elastomeric sleeve bearing, main landing gear shock strut piston cylinder, crossfeed valve, oil cooler axial fan ball bearing assembly, dowel pin, main rotor hub, or right tie attach bolt remaining in service beyond its life limit.

Whether AD 2012-23-13 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 2012-23-13 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.