Is AD 2001-25-52 a recurring Airworthiness Directive?

No — AD 2001-25-52 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2001-25-52 apply to?

AD 2001-25-52 applies to Schweizer — models 269C, 269. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2001-25-52

one-time

Official AD 2001-25-52 · FR doc 02-9729 · 2002-04-23 · airframe

Airworthiness Directives; Schweizer Aircraft Corporation Model 269A, 269A-1, 269B, 269C, and TH-55A Helicopters

What this AD requires

This document publishes in the Federal Register an amendment adopting Airworthiness Directive (AD) 2001-25-52, which was sent previously to all known U.S. owners and operators of Schweizer Aircraft Corporation (Schweizer) Model 269A, 269A-1, 269B, 269C, and TH-55A helicopters by individual letters. This AD supersedes an existing AD that requires inspecting and modifying or replacing, if necessary, the aluminum end fittings of each tailboom support strut (strut). That AD also requires inspecting the tailboom center attach fittings and center frame aft cluster fittings for damage, and if damaged parts are found, replacing the damaged parts. This AD requires inspecting and replacing, if necessary, each strut clevis lug (lug) on each tailboom center frame aft cluster fitting (cluster fitting), certain strut assemblies, certain tailboom attachments, and certain frame aft cluster fittings. Modifying or replacing each strut assembly within a certain time period and serializing certain strut assemblies are also required. This AD is prompted by an accident in the United Kingdom involving the in-flight structural failure of a Schweizer Model 269C helicopter. The actions specified by this AD are intended to prevent failure of a lug on a cluster fitting, rotation of a tailboom into the main rotor blades, and subsequent loss of control of the helicopter.

Which aircraft AD 2001-25-52 applies to

MakesSchweizer

Models269C, 269

Part-conditional — 269A2234, 269A2235, 269A2015, 269A2015-5, 269A2015-9, 269A2015-11, 269A2017-3, 269A2017-5.

Recurring dye-penetrant inspection of center frame aft cluster fitting strut clevis lugs (P/N 269A2234/269A2235) and strut assembly (P/N 269A2015/269A2015-5) inspection/modification to stainless-steel end fittings, per Schweizer Service Information Notice N-109.2 dated Sep 1, 1976; paragraph (c) additionally requires strut-assembly serialization specifically for Model 269C helicopters per SIN N-108 dated May 21, 1973.

Whether AD 2001-25-52 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 2001-25-52 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.