AD 2006-01-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 747-100 | Airworthiness Directives; Boeing Model 747-100, 747-100B, 747-200B, 747-200C, 747-200F, 747-400F, 747SR, and 747SP Series Airplanes |
Unsafe Condition
Cracks in the tension ties at body station 820 frame connection, and cracks found in both tension ties and frames at tension tie to frame connections at body stations 800, 820, and 840. These cracks could lead to cracks in the skin and body frame, resulting in rapid in-flight depressurization.
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Required Actions
Perform detailed and high-frequency eddy current inspections for cracks in each affected tension tie and surrounding structure. If any cracking is found, before further flight, perform all applicable corrective and related investigative actions in accordance with Boeing Special Attention Service Bulletin 747-53-2502.
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Compliance Time
Within the compliance times specified in the AD, unless the actions have already been performed.
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Affected Aircraft
Boeing Model 747-100, 747-100B, 747-200B, 747-200C, 747-200F, 747-400F, 747SR, and 747SP series airplanes, certificated in any category, without a stretched upper deck or stretched upper deck modification, as identified in Boeing Special Attention Service Bulletin 747-53-2502.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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