AD 68-22-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 707-300 Series | BOEING Model 707-300, -400, -300B, and -300C Series Aircraft |
| aircraft | The Boeing Company | 707-300B Series | BOEING Model 707-300, -400, -300B, and -300C Series Aircraft |
| aircraft | The Boeing Company | 707-300C Series | BOEING Model 707-300, -400, -300B, and -300C Series Aircraft |
| aircraft | The Boeing Company | 707-400 Series | BOEING Model 707-300, -400, -300B, and -300C Series Aircraft |
Unsafe Condition
Cracks in the faying surface around and emanating from the fastener holes in the trailing edge of the upper wing skin at wing stations 211 and 232.
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Required Actions
Inspect for cracks using eddy current or dye penetrant techniques at specified intervals. Repair cracks based on length: up to 1.25 inches with limited service continuation, up to 3.0 inches with Part II of SB 1796, or over 3.0 inches with SB 2607. Inspect gaps at WS 232 and shim as needed. Remove fasteners and inspect for abrasion if straps are missing or field-installed. Install internal crack stop plates within 6000 hours if previously repaired under SB 1796 Rev 2.
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Compliance Time
Before the accumulation of 7700 hours time in service and at intervals not exceeding 100 hours time in service from the last inspection (for aircraft with <7500 hours on AD effective date) or within the next 200 hours time in service and at intervals not exceeding 100 hours (for aircraft with ≥7500 hours).
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Affected Aircraft
Boeing Model 707-300, -400, -300B, and -300C Series aircraft listed in Boeing Service Bulletin 1796 (R-3) or later FAA-approved revisions.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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