Is AD 98-02-02 a recurring Airworthiness Directive?

Yes — AD 98-02-02 requires a repetitive inspection every 4000 hours. Next-due depends on the aircraft's time in service.

Which aircraft does AD 98-02-02 apply to?

AD 98-02-02 applies to Boeing — models 747. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 98-02-02

recurring

Official AD 98-02-02 · FR doc 98-713 · 1998-01-16 · airframe

Airworthiness Directives; Boeing Model 747 Series Airplanes Equipped with Pratt & Whitney JT9D-3 and -7 Series Engines

What this AD requires

This amendment supersedes an existing airworthiness directive (AD), applicable to certain Boeing Model 747 series airplanes, that currently requires repetitive inspections for discrepancies of the forward engine mount bulkhead of the nacelle strut, and corrective action, if necessary. That AD also provides for optional terminating action for the repetitive inspections. For certain airplanes, this amendment adds repetitive inspections for discrepancies in the forward engine mount bulkhead and in the forward lower spar web, and corrective actions, if necessary. For other airplanes, this amendment adds a one- time inspection to detect stop drilled cracks of the exterior of the forward engine mount chord, and replacement of the chord with a new chord, if necessary. This amendment also adds an additional optional terminating action for the repetitive inspections. This amendment is prompted by reports that fatigue cracking was found in an area adjacent to the inspection area specified in the existing AD. The actions specified in this AD are intended to detect and correct such fatigue cracking, which could lead to the failure of the forward engine mount bulkhead and consequent separation of the engine from the airplane.

Repetitive inspection. Re-inspect every 4000 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 98-02-02 applies to

MakesBoeing

Models747

Applies to each Model 747 series airplane, regardless of whether it has been modified, altered, or repaired in the affected area (AMOC required per paragraph (f) if such work affects compliance). To detect and correct fatigue cracking of the forward engine mount bulkhead (nacelle strut), which could lead to bulkhead failure and separation of the engine from the airplane: requires inspection for loose/missing fasteners attaching the forward engine mount bulkhead to the horizontal fire wall, and a penetrant inspection for cracking of the bulkhead chords, per one of the listed revisions of Boeing (Alert) Service Bulletin 747-54A2069 (Revisions 2 through 9, dated February 1980 through May 1997).

Whether AD 98-02-02 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 98-02-02 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.