Is AD 2012-23-02 a recurring Airworthiness Directive?

No — AD 2012-23-02 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2012-23-02 apply to?

AD 2012-23-02 applies to Agusta — models A109E, A109S, A109. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2012-23-02

one-time

Official AD 2012-23-02 · FR doc 2012-28432 · 2012-12-12 · airframe

Airworthiness Directives; Agusta S.p.A. Helicopters

What this AD requires

We are adopting a new airworthiness directive (AD) for Agusta S.p.A. (Agusta) Model A109E and Model A109S helicopters with certain lower semichannel assemblies installed. This AD requires a one-time inspection of the lower semichannel assemblies to determine if metallic spacers are installed. If the metallic spacers are installed, this AD requires an inspection for the correct installation of the metallic spacers on the semichannels and for the correct seating of the gaskets. If the metallic spacers are not installed with rivets, the lower semichannel assemblies must be modified, and the main drive shaft must be inspected for damage. This AD was prompted by reports of damage to the main drive shaft caused by improperly secured metallic spacers on some A109 model helicopters. The actions of this AD are intended to detect missing spacer rivets, which could allow the metallic spacers to rotate and lead to damage and failure of the main drive shaft, and subsequent loss of helicopter control.

Which aircraft AD 2012-23-02 applies to

MakesAgusta

ModelsA109E, A109S, A109

Serial-conditional — narrows to serials ?–11694, ?–22034.

Part-conditional — 109-0641-10-213, 109-0642-01-171.

Applies only with lower semichannel assembly (sub-component of forward firewall assembly) P/N 109-0641-10-213 or 109-0642-01-171 installed. A109E: S/N up to and including 11694, except S/N 11633 and 11634. A109S: S/N up to and including 22034, except S/N 22026 and 22033.

Whether AD 2012-23-02 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 2012-23-02 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.