Is AD 2015-25606 a recurring Airworthiness Directive?

No — AD 2015-25606 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2015-25606 apply to?

AD 2015-25606 applies to Honeywell International — models 5, 5A, 5AB, 5B, 10, 10R, 10U, 10UF. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2015-25606

one-time

AD 2015-25606 · 2015-10-09 · turboprop engine

Airworthiness Directives; Honeywell International Inc. Turboprop Engines (Type Certificate Previously Held by AlliedSignal Inc., Garrett Engine Division; Garrett Turbine Engine Company; and AiResearch Manufacturing Company of Arizona)

What this AD requires

We are adopting a new airworthiness directive (AD) for certain Honeywell International Inc. TPE331-5, -5A, -5AB, -5B, -10, -10R, -10U, -10UF, -10UG, -10UGR, and -10UR model turboprop engines. This AD was prompted by engine propeller shaft coupling failures, leading to unexpected propeller pitch changes causing increased aerodynamic and asymmetric drag on the airplanes using these engines. This AD requires removing certain part number (P/N) engine propeller shaft couplings from service. This AD also requires inserting a copy of certain airplane operating procedures into applicable flight manuals. We are issuing this AD to prevent loss of airplane control, leading to an accident.

Which aircraft AD 2015-25606 applies to

MakesHoneywell International

Models5, 5A, 5AB, 5B, 10, 10R, 10U, 10UF, 10UG, 10UGR, 10UR, TPE331

Part-conditional — 3107065-1, 865888-3, 865888-6, 865888-8.

Applies only to engines with an engine propeller shaft coupling, P/N 3107065-1, 865888-3, 865888-6, or 865888-8, installed.

Whether AD 2015-25606 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 2015-25606 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.