AD 78-03-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 707-100 Long Body | BOEING Model 707-100/-100B/-200 Series Airplanes |
| aircraft | The Boeing Company | 707-100B Long Body | BOEING Model 707-100/-100B/-200 Series Airplanes |
| aircraft | The Boeing Company | 707-100B Short Body | BOEING Model 707-100/-100B/-200 Series Airplanes |
| aircraft | The Boeing Company | 707-200 | BOEING Model 707-100/-100B/-200 Series Airplanes |
Unsafe Condition
Cracks in the upper rear spar chord horizontal leg and adjacent wing skin from the side of the body at BBL 70.5 to WS274.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
X-ray inspect the upper rear spar chord horizontal leg and adjacent wing skin within the next 750 landings or within the last 750 landings, and thereafter every 1500 landings. Repair cracked wing skins or rear spar chords prior to further flight per paragraph B, including stop drilling cracks, inspecting fastener holes, eddy current inspections every 50 landings, and permanent repair within 750 landings.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
upon the accumulation of 20,000 landings
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Boeing Model 707-100/-100B/-200 series airplanes certificated in all categories
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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