AD 2000-08-14
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 747 | Airworthiness Directives; Boeing Model 747 Series Airplanes |
Unsafe Condition
Cracking of H-11 steel bolts at the wing rear spar side-of-body on the lower chord splice plate and kick fitting due to stress corrosion, which could result in reduced structural integrity of the wing-to-body joint structure.
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Required Actions
Conduct repetitive inspections or checks to detect broken H-11 steel bolts; replace any cracked or broken bolts; and eventually replace all existing H-11 steel bolts with new Inconel bolts as terminating action.
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Compliance Time
Within 12 months of effective date for initial inspection; repetitive inspections every 18 months thereafter.
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Affected Aircraft
Boeing Model 747 series airplanes, as specified in Boeing Service Bulletin 747-57A2309, Revision 1.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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