AD 2000-09-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 747-100 | Airworthiness Directives; Boeing Model 747-100, -200, 747SP, and 747SR Series Airplanes Equipped With Pratt & Whitney JT9D-7, -7A, -7F, and -7J Series Engines |
| engine | Pratt & Whitney | JT9D-7 | Airworthiness Directives; Boeing Model 747-100, -200, 747SP, and 747SR Series Airplanes Equipped With Pratt & Whitney JT9D-7, -7A, -7F, and -7J Series Engines |
Unsafe Condition
Cracking of the nose cowl mounting flange could lead to nose cowl separation from the engine, potentially causing collateral damage to the airplane and, possibly, reduced controllability.
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Required Actions
Perform one-time detailed visual and eddy current inspections to detect cracking of the nose cowl mounting flange; rework the nose cowl mounting flange; conduct eddy current inspection to detect cracking of the reworked nose cowl mounting flange; and take corrective action if necessary.
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Compliance Time
Within 24 months of the effective date.
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Affected Aircraft
Boeing Model 747-100, -200, 747SP, and 747SR series airplanes equipped with Pratt & Whitney JT9D-7, -7A, -7F, and -7J series engines.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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