AD 2010-09-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company Model 747-200B | Airworthiness Directives; The Boeing Company Model 747-200B Series Airplanes |
Unsafe Condition
Cracking of the fuselage skin lap joints at stringer 6 on the left and right sides from station (STA) 340 to STA 400, where external doublers were not installed, could result in rapid decompression and loss of structural integrity of the airplane.
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Required Actions
Conduct repetitive inspections for cracking of the fuselage skin lap joints at stringer 6 on the left and right sides from STA 340 to STA 400. Perform a one-time general visual inspection to determine if certain fasteners are installed and if service repair manual (SRM) repairs or repair doublers are installed. Take corrective actions if necessary, including repairing any cracks found and contacting Boeing for repair instructions if certain fasteners or SRM repairs are found.
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Compliance Time
Before further flight for corrective actions; initial inspections are due 10,000 flight cycles after the airplane was modified to the SUD configuration, or within 50 flight cycles after the date on Boeing Alert Service Bulletin 747-53A2809, whichever occurs later. Repetitive inspections are due every 3,000 flight cycles.
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Affected Aircraft
The Boeing Company Model 747-200B series airplanes modified to the stretched upper deck (SUD) configuration.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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