AD 2006-05-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 747-200C | Airworthiness Directives; Boeing Model 747-200C, -200F, -400, -400D, and -400F Series Airplanes |
Unsafe Condition
Fatigue cracks can occur in the overlapping (upper) skin, upper fastener row of the lap joints of the fuselage skin in sections 41, 42, and 46, which could adversely affect the structural integrity of the airplane.
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Required Actions
Perform repetitive inspections for cracks in the overlapping (upper) skin, upper fastener row of the lap joints of the fuselage skin in sections 41, 42, and 46 using external surface high frequency eddy current (HFEC), external low frequency eddy current (LFEC), and internal LFEC methods. Conduct related investigative and corrective actions as necessary, including repairs using an approved method.
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Compliance Time
Varies based on prior inspections and structural significant item (SSI) history, as detailed in Table 1 of the AD.
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Affected Aircraft
Boeing Model 747-200C, -200F, -400, -400D, and -400F series airplanes, certificated in any category, as identified in Boeing Alert Service Bulletin 747-53A2499, dated August 11, 2005.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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