AD Amdt-39-11431
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 757 | Airworthiness Directives; Boeing Model 757 Series Airplanes Equipped With Rolls Royce Engines |
Unsafe Condition
Fatigue cracking in primary strut structure due to higher actual operational loads than analytical loads used in initial design, potentially leading to reduced structural integrity before reaching design service objective.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Modify the nacelle strut and wing structure in accordance with Boeing Service Bulletin 757-54-0035. Complete all terminating actions listed in the service bulletins prior to or concurrently with the modification.
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Compliance Time
Within 3,000 flight cycles after the effective date of this AD, or prior to the accumulation of 37,500 total flight cycles, or prior to 20 years since the date of manufacture, whichever occurs first.
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Affected Aircraft
Boeing Model 757 series airplanes equipped with Rolls Royce engines, line numbers 1 through 735 inclusive, certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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