AD 2006-09-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 747-100 | Airworthiness Directives; Boeing Model 747-100, 747-100B, 747-100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747SR, and 747SP Series Airplanes |
Unsafe Condition
Fractured and cracked forward lugs of the rear engine mount thrust link on the number one strut, which could lead to the loss of the load path for the rear engine mount bulkhead and damage to other primary engine mount structure, potentially resulting in in-flight engine separation and loss of control.
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Required Actions
Replace the thrust links with new or overhauled thrust links, ending the requirement for repetitive detailed and ultrasonic inspections. The initial replacement must be completed within the specified compliance times unless previously accomplished.
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Compliance Time
Within the specified compliance times, unless the actions have already been done.
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Affected Aircraft
Boeing Model 747-100, 747-100B, 747-100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747SR, and 747SP series airplanes, certificated in any category, equipped with Pratt & Whitney JT9D-3 and -7 series engines (except JT9D-70 engines), as identified in Boeing Alert Service Bulletin 747-71A2309.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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