AD 65-09-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 707-100 Long Body | BOEING Model 707 Series Aircraft |
| aircraft | The Boeing Company | 707-100B Long Body | BOEING Model 707 Series Aircraft |
| aircraft | The Boeing Company | 707-100B Short Body | BOEING Model 707 Series Aircraft |
| aircraft | The Boeing Company | 707-200 | BOEING Model 707 Series Aircraft |
| aircraft | The Boeing Company | 707-300 Series | BOEING Model 707 Series Aircraft |
| aircraft | The Boeing Company | 707-300B Series | BOEING Model 707 Series Aircraft |
| aircraft | The Boeing Company | 707-300C Series | BOEING Model 707 Series Aircraft |
| aircraft | The Boeing Company | 707-400 Series | BOEING Model 707 Series Aircraft |
Unsafe Condition
Failure of the rear engine mount nut due to embrittlement from cadmium melting caused by excessive temperatures.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Visually inspect the engine mount cone bolt nut for cracks or melted cadmium within 300 hours' time in service after the AD's effective date and every 300 hours thereafter. Replace cadmium-plated nuts and washers with silver-plated equivalents before further flight if cracks or melted cadmium are found. Complete replacement of cadmium-plated components with silver-plated ones within 1,000 hours' time in service after the effective date.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the specified time frames: initial inspection within 300 hours' time in service after May 29, 1965, subsequent inspections every 300 hours, and full replacement within 1,000 hours' time in service. Adjustments may be made upon FAA approval.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Boeing Model 707 Series Aircraft with serial numbers 17592 through 17608, 17614 through 17627, 17673 through 17690, 17692 through 17695, 17918 through 17924, 17928 through 17930, 18083 through 18085, 18245, 18246, 18374, 18375, and 18460.
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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