AD 2015-25-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company | Airworthiness Directives; The Boeing Company Airplanes |
Unsafe Condition
The lap splices of the aft pressure bulkhead webs are subject to widespread fatigue damage on aging Model 777 airplanes that have accumulated at least 38,000 total flight cycles. Fatigue cracking in the aft webs of the radial lap splices of the aft pressure bulkhead could result in reduced structural integrity of the airplane, decompression of the cabin, and collapse of the floor structure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect for any cracking in the aft webs of the radial lap splices of the aft pressure bulkhead using medium frequency eddy current inspection, in accordance with Boeing Alert Service Bulletin 777-53A0078. Repeat the inspection at intervals not to exceed 8,400 flight cycles. If any crack is found, perform applicable corrective actions as specified in the service bulletin. If a corrective action requires contact with Boeing, repair using an approved method before further flight.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the compliance times specified in Boeing Alert Service Bulletin 777-53A0078, unless already done.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
All The Boeing Company Model 777-200, -200LR, -300, -300ER, and 777F series airplanes, certificated in any category.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.