Airworthiness Directive 2000-18-01
one-timeAirworthiness Directives; Boeing Model 747 Series Airplanes Powered By Pratt & Whitney JT9D-7 Series Engines
What this AD requires
This amendment adopts a new airworthiness directive (AD) that is applicable to certain Boeing Model 747 series airplanes powered by Pratt & Whitney JT9D-7 series engines. This action requires inspection of the lugs on the bulkhead fitting of the rear engine mount, and corrective action, if necessary. This action is necessary to detect and correct bushing migration, corrosion, or cracking of the lugs on the bulkhead fitting of the rear engine mount, which could result in separation of the engine from the airplane. This action is intended to address the identified unsafe condition.
Which aircraft AD 2000-18-01 applies to
Repetitive detailed visual and feeler-gage inspections of the lugs on the bulkhead fitting of the rear engine mount for bushing migration, corrosion, or cracking per Boeing Alert SB 747-54A2200 (dated July 7, 2000). Initial inspection prior to 10,000 total flight cycles or 15 years since manufacture (whichever first) or within 90 days of the AD effective date, whichever is later; repeat at intervals not to exceed 90 days.
Whether AD 2000-18-01 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:
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.