AD 2003-25-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 747-100 | Airworthiness Directives; Boeing Model 747-100, 747-100B, 747-100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747-400, 747SR, and 747SP Series Airplanes |
Unsafe Condition
Broken H-11 steel bolts in the latch fittings of the cargo doors could reduce the capability of the door latch to keep the door closed, resulting in loss of a cargo door and consequent rapid depressurization of the airplane.
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Required Actions
Perform a one-time detailed inspection to identify all H-11 steel bolts installed in the latch fittings of the cargo doors. For any H-11 steel bolts found, conduct an ultrasonic inspection for cracks or breaks, or replace them with Inconel bolts. Replace all H-11 steel bolts with Inconel bolts within 6 years after the effective date. No H-11 steel bolts may be installed in the latch fittings after the effective date.
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Compliance Time
Within 1 year for initial inspection; before further flight for cracked or broken bolts; within 6 years for terminating action; no H-11 steel bolts may be installed after the effective date.
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Affected Aircraft
Boeing Model 747-100, 747-100B, 747-100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747-400, 747SR, and 747SP series airplanes; line numbers 1 through 721 inclusive, 976, and 982; certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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