AD 68-23-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 707-100 Long Body | BOEING Model 707 and 720 Series Aircraft |
| aircraft | The Boeing Company | 707-100B Long Body | BOEING Model 707 and 720 Series Aircraft |
| aircraft | The Boeing Company | 707-100B Short Body | BOEING Model 707 and 720 Series Aircraft |
| aircraft | The Boeing Company | 707-200 | BOEING Model 707 and 720 Series Aircraft |
| aircraft | The Boeing Company | 707-300 Series | BOEING Model 707 and 720 Series Aircraft |
| aircraft | The Boeing Company | 707-300B Series | BOEING Model 707 and 720 Series Aircraft |
| aircraft | The Boeing Company | 707-300C Series | BOEING Model 707 and 720 Series Aircraft |
| aircraft | The Boeing Company | 707-400 Series | BOEING Model 707 and 720 Series Aircraft |
| aircraft | The Boeing Company | 720 Series | BOEING Model 707 and 720 Series Aircraft |
| aircraft | The Boeing Company | 720B Series | BOEING Model 707 and 720 Series Aircraft |
Unsafe Condition
Cracking of fin-body terminal fittings, part number 5-84487, could result in structural failure of the vertical stabilizer.
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Required Actions
Inspect fin-body terminal fittings per Service Bulletin 2399, rework or replace cracked fittings, and replace fittings within specified times or install a new assembly per SB 2422.
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Compliance Time
Within the times listed in Inspection Schedules I, II, and III of Boeing Service Bulletin No. 2399, Revision 8, or later FAA-approved revision.
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Affected Aircraft
Boeing Model 707 and 720 Series aircraft listed in Boeing Service Bulletin 2399, Revision 8.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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