Is AD 2011-23-13 a recurring Airworthiness Directive?

Yes — AD 2011-23-13 requires a repetitive inspection. Next-due depends on the aircraft's time in service.

Airworthiness Directive 2011-23-13

Q: Which aircraft does AD 2011-23-13 apply to?

AD 2011-23-13 applies to Honeywell International Inc. — models LTS101-600A-2, LTS101-600A-3, LTS101-600A-3A, LTS101-700D-2, LTS101. Serial/part conditions may narrow it to specific aircraft.

recurring

Official AD 2011-23-13 · FR doc 2011-29229 · 2011-11-14 · turboshaft engine

Airworthiness Directives; Honeywell International Inc. Turboshaft Engines

What this AD requires

We are adopting a new airworthiness directive (AD) for Honeywell International Inc. LTS101-600A-2, -3, -3A, and LTS101-700D-2 turboshaft engines with certain power turbine governors (PTG) model AL- AB1, installed, that are marked with compliance symbol N or P, or with no compliance symbol, on the PTG identification plate. This AD requires initial and repetitive replacements of the affected PTGs. This AD was prompted by reports of two accidents where the engines suddenly lost power and the helicopters had to make emergency autorotation landings, leading to substantial damage to the helicopters. We are issuing this AD to prevent loss of engine power, leading to emergency autorotation landing and damage to the helicopter.

Repetitive inspection. Re-inspect. The next-due date/hours depend on this aircraft’s time in service — a records report computes it from the logbooks.

Which aircraft AD 2011-23-13 applies to

MakesHoneywell International Inc.

ModelsLTS101-600A-2, LTS101-600A-3, LTS101-600A-3A, LTS101-700D-2, LTS101

Part-conditional — 4-301-289-03, 4-301-289-05, 4-301-289-09, 4-301-101-16, 4-301-101-18.

Applies only when a power turbine governor (PTG) model AL-AB1 (P/N 4-301-289-03, -05, or -09, or 4-301-101-16 or -18) marked with compliance symbol N or P, or with no compliance symbol, on the PTG identification plate, is installed.

Whether AD 2011-23-13 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 2011-23-13 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.