Is AD 95-21-02 a recurring Airworthiness Directive?

No — AD 95-21-02 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 95-21-02 apply to?

AD 95-21-02 applies to Schweizer. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 95-21-02

one-time

Official AD 95-21-02 · FR doc 95-25330 · 1995-10-13 · airframe

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

What this AD requires

This amendment supersedes an existing airworthiness directive (AD), applicable to Schweizer Aircraft Corporation and Hughes Helicopters, Inc. Model 269A, 269A-1, 269B, 269C, and TH-55A helicopters with certain main rotor (M/R) drive shafts installed, that currently requires a one-time radiographic inspection or other non- destructive inspection of certain M/R drive shafts for cracks, distortion, corrosion, or other surface damage, at specified time intervals or upon the occurrence of specified conditions. This amendment requires the same inspections as the previous AD, but expands the applicability of certain inspections to additional models of the affected helicopters, and excludes certain M/R drive shafts from certain inspections. This amendment is prompted by a reevaluation as a result of a comment to the previous AD suggesting the need to expand the applicability of certain inspections to additional models of the affected helicopters and to exclude certain M/R drive shafts from certain inspections. The actions specified by this AD are intended to prevent structural failure of the M/R drive shaft, separation of the M/ R from the helicopter, and subsequent loss of control of the helicopter.

Which aircraft AD 95-21-02 applies to

MakesSchweizer

Specific helicopter models are named in a preceding applicability provision not captured in the extracted text; only the boilerplate modified/altered/repaired clause and Schweizer Service Bulletin B-255.1 (dated Feb 1, 1993) reference were retrieved. AD requires inspection of the main rotor (M/R) drive shaft; drive shaft serial number ranges S0001-S1111 and S1112-and-higher (component S/N, not aircraft S/N) determine inspection interval; drive shafts with an 'SZ' or 'ZS' S/N prefix are exempt from pre-installation inspection.

Whether AD 95-21-02 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 95-21-02 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.