AD 2007-19-19
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, 747SR, and 747SP Series Airplanes |
Unsafe Condition
Loose fasteners and/or damaged or cracked hanger fittings, back-up angles, and bulkhead of the forward engine mount, which could lead to failure of the hanger fitting and bulkhead and consequent separation of the engine from the airplane.
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Required Actions
Inspect torque stripes and bulkhead of the forward engine mount and adjacent support structure for cracks and/or fretting damage, and check for loose or under-torqued fasteners. Perform HFEC, detailed, or fluorescent penetrant inspections of the bulkhead for cracks of the bulkhead chords, evidence of a fractured internal angle, or cracks/fracture of the internal angles. Replace discrepant parts and fasteners as necessary. Optional inspections for cracks or fracture of the internal angle and stiffener are also provided.
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Compliance Time
Before further flight or within 18 months for related investigative and corrective actions. Initial inspections due within 90 days or 18 months, depending on type, with repeat intervals of 6, 18, or 36 months.
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Affected Aircraft
Boeing Model 747-100, 747-100B, 747-100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747SR, and 747SP series airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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