AD 2007-25-18
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 747-400 and 747-400D | Airworthiness Directives; Boeing Model 747-400 and 747-400D Series Airplanes |
Unsafe Condition
The overhead lateral shear beam aft of main entry door number 5 does not meet the 9g forward loading requirement, reacting to loads from the weight of the center stowage bins of zone E and additional loads, which could result in detachment of the center stowage bins of zone E at forward load levels less than 9g during an emergency landing.
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Required Actions
For certain airplanes, modify the stowage bin ladder of zone E by installing new tie rod fittings, installing new right and left intercostals, and removing existing tie rods. For certain other airplanes, modify the lateral shear beam by installing additional stiffeners.
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Compliance Time
Before further flight
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Affected Aircraft
Boeing Model 747-400 and 747-400D series airplanes, certificated in any category, as identified in Boeing Special Attention Service Bulletin 747-53-2498, dated December 19, 2006.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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