AD 2007-16-19
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 747-200B | Airworthiness Directives; Boeing Model 747-200B, 747-300, and 747-400 Series Airplanes |
Unsafe Condition
Cracking of the aft tension tie channels from body station (BS) 1120 to BS 1220 and from BS 880 to BS 1100, which could result in failure of more than one tension tie and lead to rapid depressurization of the airplane.
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Required Actions
Inspect for cracking of the aft tension tie channels from BS 1120 to BS 1220 and from BS 880 to BS 1100. Repair any cracks found, including contacting Boeing for repair instructions if a crack is found in a bolt hole. Repeat inspections at intervals not to exceed 4,000 flight cycles.
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Compliance Time
Before further flight for any cracks found. Initial inspections must be completed before the accumulation of 4,000 flight cycles since modification to special freighter or converted freighter, or within 1,000 flight cycles after the date of the service bulletin, whichever occurs later.
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Affected Aircraft
Boeing Model 747-200B, 747-300, and 747-400 series airplanes that have been modified to a special freighter configuration.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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