AD 2003-04-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 747-200B and -200F | Airworthiness Directives; Boeing Model 747-200B and -200F Series Airplanes Powered by Pratt & Whitney JT9D-70 Series Engines |
| engine | Pratt & Whitney | JT9D-70 Series | Airworthiness Directives; Boeing Model 747-200B and -200F Series Airplanes Powered by Pratt & Whitney JT9D-70 Series Engines |
Unsafe Condition
Heat damage (discoloration, wrinkling, and cracking) to the pylon skin and internal structure of the nacelle struts adjacent to and aft of the precooler exhaust vent could result in cracking or fracture of the nacelle struts, leading to reduced structural integrity and possible separation of the strut and engine from the airplane.
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Required Actions
Conduct repetitive detailed inspections of the pylon skin and internal structure of the nacelle struts for heat damage. Take corrective action, if necessary, to address identified damage.
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Compliance Time
Before further flight
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Affected Aircraft
Boeing Model 747-200B and -200F series airplanes powered by Pratt & Whitney JT9D-70 series engines.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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