AD 2004-16-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 747 | Airworthiness Directives; Boeing Model 747 Series Airplanes |
Unsafe Condition
Propagation of fatigue cracks in the vicinity of 'oil cans' on the web of the aft pressure bulkhead, which could result in rapid decompression and overpressurization of the tail section, and consequent loss of control of the airplane.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Perform a detailed inspection of the aft pressure bulkhead for indications of oil cans and previous oil can repairs. If no oil can is found, repeat the inspection at intervals not to exceed 2,000 flight cycles. If an oil can is found, perform an eddy current inspection for cracks. Depending on the results, repeat the eddy current inspection at intervals not to exceed 1,000 flight cycles or repair the oil can.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 1,000 flight cycles after the effective date of this AD, or prior to the accumulation of 30,000 total flight cycles, whichever is later.
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Affected Aircraft
All Model 747 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 6, 2026
Rights: U.S. Government Public Domain
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