Is AD 99-11618 a recurring Airworthiness Directive?

Yes — AD 99-11618 requires a repetitive inspection. Next-due depends on the aircraft's time in service.

Which aircraft does AD 99-11618 apply to?

AD 99-11618 applies to Boeing — models 747-200. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 99-11618

recurring

AD 99-11618 · 1999-05-11 · airframe

Airworthiness Directives; Boeing Model 747-100, 747-200, and 747- SP Series Airplanes and Military Type E-4B Airplanes

What this AD requires

This amendment adopts a new airworthiness directive (AD), applicable to certain Boeing Model 747-100, -200, and 747-SP series airplanes and military type E-4B airplanes, that requires repetitive inspections to detect cracking of the wing front spar web, and repair of cracked structure. This amendment also provides for optional terminating action for the repetitive inspection requirements. This amendment is prompted by reports indicating that fatigue cracks were found on the aft surface of the wing front spar web. The actions specified by this AD are intended to detect and correct such fatigue cracking, which could result in a fuel leak, and consequent increased risk of a fire.

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

Which aircraft AD 99-11618 applies to

MakesBoeing

Models747-200

certain

Whether AD 99-11618 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 99-11618 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.