Is AD 2011-25481 a recurring Airworthiness Directive?

No — AD 2011-25481 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2011-25481 apply to?

AD 2011-25481 applies to Honeywell International Inc. — models TPE331. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2011-25481

one-time

AD 2011-25481 · 2011-10-04 · turboprop engine

Airworthiness Directives; Honeywell International Inc. TPE331 Model Turboprop Engines With Certain Dixie Aerospace, LLC Main Shaft Bearings

What this AD requires

We are revising an existing emergency airworthiness directive (AD) for all Honeywell International Inc. TPE331 model turboprop engines with a part manufacturer approval (PMA) replacement Dixie Aerospace, LLC main shaft bearing part number (P/N) 3108098-1WD, installed. That emergency AD was not published in the Federal Register, but was sent to all known U.S. owners and operators of these engines. That AD currently requires an inspection of the airplane records to determine if a Dixie Aerospace, LLC main shaft bearing, P/N 3108098- 1WD, is installed in the engine, and if installed, removal of that bearing from service, before further flight. This AD requires the same actions. This AD revision was prompted by the need to list the affected bearings by serial number (S/N) in the AD for clarification. We are issuing this AD to correct the unsafe condition on these products.

Which aircraft AD 2011-25481 applies to

MakesHoneywell International Inc.

ModelsTPE331

Part-conditional — 3108098-1WD.

Applies to all TPE331 model turboprop engines only when a PMA replacement Dixie Aerospace, LLC main shaft bearing, P/N 3108098-1WD, having one of the following serial numbers, is installed: A10-1727, A10-1762, A10-1764, A10-1770, A10-1771, A10-1775, A10-1776, A10-1780, A10-1786, A10-1789, A10-1796, A10-1798, A10-1799, A10-1800, A10-1801, A10-1803, A10-1804, A10-1805, A10-1809, A10-1810, A10-1811, A10-1814, A10-1818, A10-1822, A10-1825. Bearings with P/N 3108098-1 (no WD suffix) are not affected.

Whether AD 2011-25481 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 2011-25481 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.