AD 75-09-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 707-100 Long Body | BOEING Model 707-100 and 720 Series Airplanes |
| aircraft | The Boeing Company | 707-100B Long Body | BOEING Model 707-100 and 720 Series Airplanes |
| aircraft | The Boeing Company | 707-100B Short Body | BOEING Model 707-100 and 720 Series Airplanes |
| aircraft | The Boeing Company | 720 Series | BOEING Model 707-100 and 720 Series Airplanes |
| aircraft | The Boeing Company | 720B Series | BOEING Model 707-100 and 720 Series Airplanes |
Unsafe Condition
Cracks in the wing center section lower skin at the air conditioning duct anchor channel and air cycle machine support clip locations.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Visually inspect the wing center section lower skin for cracks at specified locations within 100 flights after the AD's effective date for airplanes with 20,000 or more flights. Repair cracked skins per Boeing's structural repair manual or approved method.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 100 flights after the effective date of this AD
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Affected Aircraft
Boeing Model 707-100 and 720 series airplanes certificated in all categories, as noted in Boeing Alert Service Bulletin 3220.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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