Is AD 98-25957 a recurring Airworthiness Directive?

No — AD 98-25957 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 98-25957 apply to?

AD 98-25957 applies to Mitsubishi Heavy Industries, Ltd. Mu-2B — models MU-2B. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 98-25957

one-time

AD 98-25957 · 1998-10-01 · airframe

Airworthiness Directives; Mitsubishi Heavy Industries, Ltd. MU-2B Series Airplanes

What this AD requires

This amendment adopts a new airworthiness directive (AD) that applies to certain Mitsubishi Heavy Industries, Ltd. (Mitsubishi) MU-2B series airplanes. This AD requires inspecting each forward attachment fitting bolt of the wing tip tanks for the correct bolt and replacing any incorrect bolt. This AD is the result of mandatory continuing airworthiness information (MCAI) issued by the airworthiness authority for Japan. The actions specified by this AD are intended to prevent the wing tip tank from separating from the airplane because of an incorrect bolt corroding, which could result in loss of control of the airplane.

Which aircraft AD 98-25957 applies to

MakesMitsubishi Heavy Industries, Ltd. Mu-2B

ModelsMU-2B

certain

Whether AD 98-25957 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 98-25957 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.