AD 81-06-51 R1
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 707-100 Long Body | BOEING Model 707/720 Series Airplanes |
| aircraft | The Boeing Company | 707-100B Long Body | BOEING Model 707/720 Series Airplanes |
| aircraft | The Boeing Company | 707-100B Short Body | BOEING Model 707/720 Series Airplanes |
| aircraft | The Boeing Company | 707-200 | BOEING Model 707/720 Series Airplanes |
| aircraft | The Boeing Company | 707-300 Series | BOEING Model 707/720 Series Airplanes |
| aircraft | The Boeing Company | 707-300B Series | BOEING Model 707/720 Series Airplanes |
| aircraft | The Boeing Company | 707-300C Series | BOEING Model 707/720 Series Airplanes |
| aircraft | The Boeing Company | 707-400 Series | BOEING Model 707/720 Series Airplanes |
| aircraft | The Boeing Company | 720 Series | BOEING Model 707/720 Series Airplanes |
| aircraft | The Boeing Company | 720B Series | BOEING Model 707/720 Series Airplanes |
Unsafe Condition
Cracks in the outboard wing could lead to structural failure.
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Required Actions
Perform a one-time visual inspection and repeat inspections every year per Boeing Service Bulletin A3308. Spray BMS 3-23 organic corrosion inhibitor. Repair or replace cracked parts before further flight unless approved for ferry flight under FAR 21.197/199.
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Compliance Time
within the next 75 hours time-in-service unless accomplished since January 1, 1980
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Affected Aircraft
Boeing Model 707/720 series airplanes prior to line number 885
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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