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Airworthiness Directive 98-9876

recurring
AD 98-9876 · 1998-04-15 · turbine engine

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

What this AD requires

This document corrects erroneous references that appeared in airworthiness directive (AD) 98-02-02 that was published in the Federal Register on January 16, 1998 (63 FR 2593). The erroneous references resulted in incorrect citations of AD numbers. That AD is applicable to certain Boeing Model 747 series airplanes. It supersedes an existing AD to continue to require repetitive inspections for discrepancies of the forward engine mount bulkhead of the nacelle strut, and corrective actions, if necessary. That AD also continues to provide for an optional terminating action for the repetitive inspections. For certain airplanes, the AD adds various inspections to detect discrepancies in the forward engine mount bulkhead and chord, and in the forward lower spar web, and corrective actions, if necessary. The AD also adds an additional optional terminating action for the repetitive inspections.

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 98-9876 applies to

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Equipped With

Whether AD 98-9876 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 98-9876 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.