Is AD 98-26390 a recurring Airworthiness Directive?

No — AD 98-26390 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 98-26390 apply to?

AD 98-26390 applies to British Aerospace — models RJ100A. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 98-26390

one-time

AD 98-26390 · 1998-10-06 · airframe

Airworthiness Directives; British Aerospace Model Avro 146-RJ85A and RJ100A Series Airplanes

What this AD requires

This amendment adopts a new airworthiness directive (AD), applicable to certain British Aerospace Model Avro 146-RJ85A and RJ100A series airplanes, that requires a one-time inspection for evidence of machining (undercutting) into the web of the integral stringers of the bottom skin of the wings, and corrective actions, if necessary. This amendment is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by this AD are intended to prevent reduced wing strength and stiffness, and the onset of premature fatigue cracking, which could result in reduced structural integrity of the airplane.

Which aircraft AD 98-26390 applies to

MakesBritish Aerospace

ModelsRJ100A

certain

Whether AD 98-26390 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 98-26390 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.