Is AD 99-01-05 a recurring Airworthiness Directive?

Yes — AD 99-01-05 requires a repetitive inspection every 500 hours or 24 months. Next-due depends on the aircraft's time in service.

Which aircraft does AD 99-01-05 apply to?

AD 99-01-05 applies to Piper. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 99-01-05

recurring

Official AD 99-01-05 · FR doc 98-34384 · 1998-12-31 · airframe

Airworthiness Directives; All Airplane Models of The New Piper Aircraft, Inc. (formerly Piper Aircraft Corporation) That Are Equipped with Wing Lift Struts

What this AD requires

This amendment supersedes Airworthiness Directive (AD) 93-10- 06, which currently requires repetitively inspecting the wing lift struts and wing lift strut forks for cracks or corrosion on all airplane models of The New Piper Aircraft, Inc. (Piper) that are equipped with wing lift struts, and replacing any strut or fork found cracked or corroded. This AD clarifies certain requirements of AD 93- 10-06, eliminates the lift strut fork repetitive inspection requirement on the Piper PA-25 series airplanes, incorporates models inadvertently omitted from AD 93-10-06, and requires fabricating and installing a placard on the lift strut. This AD results from reports, questions, and information received from the field on AD 93-10-06, which show a need to clarify and add information that will more fully achieve the safety intent of that AD. The actions specified by this AD are intended to prevent in-flight separation of the wing from the airplane caused by corroded wing lift struts or cracked wing lift forks, which could result in loss of control of the airplane.

Repetitive inspection. Re-inspect every 500 hours or 24 months. The next-due date/hours depend on this aircraft’s time in service — a records report computes it from the logbooks.

Which aircraft AD 99-01-05 applies to

MakesPiper

Boilerplate applicability only; the specific model/serial-number list precedes this excerpt and is not included. Requires removing and inspecting the wing lift struts for corrosion/dents per Piper Service Bulletin No. 528D (October 19, 1990) or No. 910A (October 10, 1989), with corrosion inhibitor application or repair/replacement as needed, to prevent in-flight separation of the wing due to corroded struts or cracked strut forks.

Whether AD 99-01-05 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 99-01-05 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.