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Airworthiness Directive 2018-13266

recurring
AD 2018-13266 · 2018-06-21 · turboprop engine

Airworthiness Directives; Honeywell International Inc. Turboprop and Turboshaft Engines

What this AD requires

We are adopting a new airworthiness directive (AD) for certain Honeywell International Inc. (Honeywell) TPE331 turboprop and TSE331 turboshaft engines. This AD was prompted by recent reports of failures of the direct drive fuel control gears and bearings in the hydraulic torque sensor gear assembly, part number (P/N) 3101726-3. This AD requires initial and repetitive engine oil filter sampling and analysis of the affected engines and inspections of certain hydraulic torque sensor gear assemblies. We are issuing this AD to address the unsafe condition on these products.

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 2018-13266 applies to

MakesHoneywell International Inc.
ModelsTPE331-1, TPE331-2, TPE331-2UA, TPE331-3U, TPE331-3UW, TPE331-5, TPE331-5B, TPE331-6, TPE331-6A, TPE331-8, TPE331-10, TPE331-10AV, TPE331-10N, TPE331-10P, TPE331-10R, TPE331-10T, TPE331-10U, TPE331-10UA, TPE331-10UF, TPE331-10UR, TSE331-3U, TPE331, TSE331
Part-conditional — 3101726-1, 3101726-2, 3101726-3.

Applies to engines with hydraulic torque sensor gear assemblies, P/N 3101726-1, -2, or -3, installed. Includes both TPE331 turboprop and TSE331-3U turboshaft engine models.

Whether AD 2018-13266 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 2018-13266 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.