Is AD 2012-26-06 a recurring Airworthiness Directive?

No — AD 2012-26-06 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2012-26-06 apply to?

AD 2012-26-06 applies to Sikorsky Aircraft Corporation, Erickson Air-Crane Incorporated — models S-64F, S-64. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2012-26-06

one-time

Official AD 2012-26-06 · FR doc 2013-05503 · 2013-03-12 · airframe

Airworthiness Directives; Sikorsky Aircraft-Manufactured Model S-64F Helicopters

What this AD requires

We are adopting a new airworthiness directive (AD) for Sikorsky Aircraft Corporation-manufactured Model S-64F helicopters, now under the Erickson Air-Crane Incorporated (Erickson) Model S-64F type certificate. This AD supersedes an existing AD which requires inspections, rework, and replacement, if necessary, of the main gearbox (MGB) second stage lower planetary plate (plate). Since we issued that AD, the manufacturer has conducted a configuration review and analysis, and a review of the service history of certain components. The actions of this AD are intended to establish life limits for certain components, remove various parts from service, and require consistency in the part numbers of certain four bladed tail rotor (T/R) assemblies to prevent fatigue cracking, failure from static overload, and subsequent loss of control of the helicopter.

Which aircraft AD 2012-26-06 applies to

MakesSikorsky Aircraft CorporationErickson Air-Crane Incorporated

ModelsS-64F, S-64

Model S-64F helicopters, originally manufactured by Sikorsky Aircraft Corporation, now under the Erickson Air-Crane Incorporated Model S-64F type certificate. Supersedes AD 97-10-15.

Whether AD 2012-26-06 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 2012-26-06 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.