AD 79-24-04 R1
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 707-100 Long Body | BOEING Model 707-100, 707-100B, 707-200, and 720, 720B Series Airplanes |
| aircraft | The Boeing Company | 707-100B Long Body | BOEING Model 707-100, 707-100B, 707-200, and 720, 720B Series Airplanes |
| aircraft | The Boeing Company | 707-100B Short Body | BOEING Model 707-100, 707-100B, 707-200, and 720, 720B Series Airplanes |
| aircraft | The Boeing Company | 707-200 | BOEING Model 707-100, 707-100B, 707-200, and 720, 720B Series Airplanes |
| aircraft | The Boeing Company | 720 Series | BOEING Model 707-100, 707-100B, 707-200, and 720, 720B Series Airplanes |
| aircraft | The Boeing Company | 720B Series | BOEING Model 707-100, 707-100B, 707-200, and 720, 720B Series Airplanes |
Unsafe Condition
Cracks in the horizontal stabilizer center section rear spar upper chord.
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Required Actions
Visually inspect the horizontal stabilizer center section rear spar upper chord in accordance with Boeing Service Bulletin 3332, Rev. 2, or approved method. Repair cracks prior to further flight or fly to maintenance base under FAR 21.197.
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Compliance Time
Within the next number of landings shown in Table I, if not already accomplished within the last same number of landings, and at repeat intervals not to exceed those specified.
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Affected Aircraft
Boeing 707-100, 707-100B, 707-200, and Boeing 720, 720B series airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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