AD 99-16-10
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 747-400 Series | Airworthiness Directives; BOEING Model 747-400 Series Airplanes |
| aircraft | The Boeing Company | 747-400D Series | Airworthiness Directives; BOEING Model 747-400 Series Airplanes |
| aircraft | The Boeing Company | 747-400F Series | Airworthiness Directives; BOEING Model 747-400 Series Airplanes |
Unsafe Condition
Fatigue cracking in the area surrounding the fastener holes and broken or missing fasteners on the E-42 SATCOM rack and fuselage supporting structure due to environmental vibration, which could result in SATCOM equipment falling, loss of SATCOM capabilities, passenger injury, and reduced airplane controllability.
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Required Actions
Conduct repetitive inspections of the E-42 SATCOM rack and fuselage structure to detect fatigue cracking and broken/missing fasteners, perform corrective actions as needed, and report initial inspection findings to the FAA. Inspections must follow specified service bulletins with FAA-approved repair methods.
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Compliance Time
Initial inspections for Group 1 airplanes within 30 days of effective date (August 24, 1999), Group 2 within 90 days. Repetitive inspections every 3,000 flight hours.
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Affected Aircraft
Boeing Model 747-400, 747-400D, and 747-400F series airplanes with E-42 SATCOM rack installations.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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