AD 2000-18-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 747 | Airworthiness Directives; Boeing Model 747 Series Airplanes Powered By Pratt & Whitney JT9D-7 Series Engines |
| engine | Pratt & Whitney | JT9D-7 Series | Airworthiness Directives; Boeing Model 747 Series Airplanes Powered By Pratt & Whitney JT9D-7 Series Engines |
Unsafe Condition
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.
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Required Actions
Inspect the lugs on the bulkhead fitting of the rear engine mount for bushing migration, corrosion, or cracking. Perform physical measurement inspections for bushing migration. If light corrosion or any bushing migration is found, remove corrosion and restore the finish of the fitting. If cracking or moderate-to-heavy corrosion is found, contact Boeing for rework instructions. Operators may optionally perform repetitive ultrasonic inspections for cracking of the lugs to extend the inspection interval.
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Compliance Time
Before further flight
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Affected Aircraft
Boeing Model 747 series airplanes powered by Pratt & Whitney JT9D-7 series engines, as listed in Boeing Alert Service Bulletin 747-54A2200, dated July 7, 2000.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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