AD 2001-14-18
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 747 | Airworthiness Directives; Boeing Model 747 Series Airplanes |
Unsafe Condition
Fatigue cracking of the vertical beam webs and frames from body station (BS) 260 to BS 320, which could result in collapse of the nose wheel well (NWW) pressure bulkhead and subsequent rapid decompression of the airplane.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the vertical beam webs and frames from BS 260 to BS 320 for fatigue cracking. Repair, if necessary. Perform repetitive inspections as specified in the AD. Revise the compliance schedule for previously inspected airplanes based on the service bulletin revision level. Extend the compliance time for certain airplanes that have undergone specific inspections within the last 1,500 flight cycles.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 100 flight cycles after the effective date of this AD, or 500 flight cycles for airplanes with recent inspections as specified.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Boeing Model 747 series airplanes, including additional airplanes as expanded by this AD.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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