Is AD 2013-23439 a recurring Airworthiness Directive?

No — AD 2013-23439 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2013-23439 apply to?

AD 2013-23439 applies to Sikorsky — models S-92A, S-92. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2013-23439

one-time

AD 2013-23439 · 2013-10-02 · airframe

Airworthiness Directives; Sikorsky Aircraft Corporation Helicopters

What this AD requires

We are adopting a new airworthiness directive (AD) for Sikorsky Aircraft Corporation (Sikorsky) Model S-92A helicopters to require modifying the No. 1 engine forward firewall center fire extinguisher discharge tube (No. 1 engine tube) and inspecting the outboard discharge tube to determine if it is correctly positioned. This AD was prompted by the discovery that the No. 1 engine tube installed on the helicopters is too long to ensure that a fire could be effectively extinguished in the helicopter. The actions are intended to ensure the No. 1 engine tube allows for complete coverage of an extinguishing agent in the No. 1 engine compartment area, ensure that a fire would be extinguished and prevent the loss of helicopter control.

Which aircraft AD 2013-23439 applies to

MakesSikorsky

ModelsS-92A, S-92

Serial-conditional — narrows to serials 920006–920169.

Applies only to S-92A helicopters within serial number range 920006 through 920169.

Whether AD 2013-23439 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 2013-23439 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.