Is AD 85-01-04 a recurring Airworthiness Directive?

No — AD 85-01-04 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 85-01-04 apply to?

AD 85-01-04 applies to Aviat Aircraft Inc., Pitts — models S-2A. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 85-01-04

one-time

AD 85-01-04 · 1985-01-01 · airframe

Airworthiness Directives; are not present, install P/N 2-5100-20 gussets in accordance with Pitts Service Letter No. 5, Revision B. (b) The aircraft may be

Which aircraft AD 85-01-04 applies to

MakesAviat Aircraft Inc.Pitts

ModelsS-2A

Part-conditional — 2-5100-20.

If gussets are not present, install P/N 2-5100-20 gussets in accordance with Pitts Service Letter No. 5, Revision B. Aircraft may be flown per FAR 21.197 to a location where the AD can be accomplished; equivalent means of compliance approved by the Denver Aircraft Certification Office. Effective January 21, 1985.

Whether AD 85-01-04 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 85-01-04 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 →

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.