AD Amdt-39-16147
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company Model 707 | Airworthiness Directives; The Boeing Company Model 707 Airplanes, and Model 720 and 720B Series Airplanes |
| aircraft | Aviat | Various | Airworthiness Directives; The Boeing Company Model 707 Airplanes, and Model 720 and 720B Series Airplanes |
Unsafe Condition
Potential for ignition sources inside fuel tanks caused by latent failures, alterations, repairs, or maintenance actions, which, in combination with flammable fuel vapors, could result in fuel tank explosions and consequent loss of the airplane.
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Required Actions
Revise the FAA-approved maintenance program by incorporating new airworthiness limitations (AWLs) for fuel tank systems to satisfy SFAR No. 88 requirements. Conduct an initial inspection to phase in certain repetitive AWL inspections, and repair if necessary. Clarify the intended effect of the AD on spare and on-airplane fuel tank system components regarding maintenance manuals and instructions for continued airworthiness.
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Compliance Time
Within 50 flight hours after the effective date of the AD.
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Affected Aircraft
The Boeing Company Model 707 airplanes, and Model 720 and 720B series airplanes.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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