Is AD 98-25956 a recurring Airworthiness Directive?

Yes — AD 98-25956 requires a repetitive inspection every 50 hours. Next-due depends on the aircraft's time in service.

Which aircraft does AD 98-25956 apply to?

AD 98-25956 applies to Aviat — models S-1S, S-1T, S-2, S-2A, S-2S, S-2B, S-1. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 98-25956

recurring

AD 98-25956 · 1998-10-01 · airframe

Airworthiness Directives; Aviat Aircraft, Inc. Models S-1S, S-1T, S-2, S-2A, S-2S, and S-2B Airplanes

What this AD requires

This amendment revises Airworthiness Directive (AD) 96-12-03 R1, which applies to Aviat Aircraft, Inc. (Aviat) Models S-1S, S-1T, S- 2, S-2A, S-2S, and S-2B airplanes that are equipped with aft lower fuselage wing attach fittings incorporating part number (P/N) 76090, P/ N 2-2107-1, or P/N 1-210-102. AD 96-12-03 R1 currently requires repetitively inspecting the aft lower fuselage wing attach fitting on both wings for cracks, and modifying any cracked aft lower fuselage wing attach fitting. Modifying both aft lower fuselage wing attach fittings eliminates the repetitive inspection requirement of AD 96-12- 03. Aviat started incorporating modified aft lower fuselage wing attach fittings on newly manufactured airplanes beginning with serial number 5337, instead of 5349 as referenced in the existing AD. This AD retains the repetitive inspection and possible modification requirements of AD 96-12-03 R1, and will change the applicability accordingly. The actions specified by this AD are intended to prevent possible in-flight separation of the wing from the airplane caused by a cracked fuselage wing attach fitting.

Repetitive inspection. Re-inspect every 50 hours. The next-due date/hours depend on this aircraft’s time in service — a records report computes it from the logbooks.

Which aircraft AD 98-25956 applies to

MakesAviat

ModelsS-1S, S-1T, S-2, S-2A, S-2S, S-2B, S-1

Serial-conditional — narrows to serials 5000–5336.

Part-conditional — 76090, 2-2107-1, 1-210-102.

S-1S, S-1T, S-2, S-2A, S-2S: all serial numbers. S-2B: s/n 5000 through 5336. Applies only if equipped with aft lower fuselage wing attach fittings incorporating P/N 76090, P/N 2-2107-1, or P/N 1-210-102 that have not been modified per Aviat SB No. 25 (dated April 3, 1996, various revisions).

Whether AD 98-25956 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 98-25956 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.