Is AD 2012-23-11 a recurring Airworthiness Directive?

No — AD 2012-23-11 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2012-23-11 apply to?

AD 2012-23-11 applies to Erickson Air-Crane — models S-64F, S-64. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2012-23-11

one-time

Official AD 2012-23-11 · FR doc 2012-28434 · 2012-12-10 · airframe

Airworthiness Directives; Erickson Air-Crane Incorporated Helicopters

What this AD requires

We are adopting a new airworthiness directive (AD) for Erickson Air-Crane Incorporated (Erickson) Model S-64F helicopters. This AD requires inspecting for cracking or working rivets in each left and right splice fitting (transition fitting), the pylon bulkhead assembly-canted (bulkhead assembly), and the pylon steel strap (strap). This AD was prompted by several reports of cracking in the transition fittings, the bulkhead assembly, and the pylon. The actions specified by this AD are intended to detect cracking in the rotary rudder boom or pylon due to fatigue, and to prevent failure from static overload and subsequent loss of control of the helicopter.

Which aircraft AD 2012-23-11 applies to

MakesErickson Air-Crane

ModelsS-64F, S-64

Part-conditional — 6420-66341-101, 6420-66341-102, 6420-66341-103, 6420-66341-104, 6420-66340-043, 6420-66340-044, 6420-66301-119, 6420-66301-127.

Applies only when left or right splice fitting (transition fitting) P/N 6420-66341-101/-102/-103/-104; pylon bulkhead assembly-canted P/N 6420-66340-043 or -044; or pylon steel strap P/N 6420-66301-119 or -127 is installed.

Whether AD 2012-23-11 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 2012-23-11 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.