AD 2005-20-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 707 | Airworthiness Directives; Boeing Model 707 Airplanes, and Boeing Model 720 and 720B Series Airplanes |
Unsafe Condition
Dry operation of the fuel pumps in the center fuel tank could result in high temperatures or sparks inside the fuel tank, ignition of fuel vapors, and consequent fire or explosion. Resetting a tripped circuit breaker for a fuel pump in any tank could allow an electrical fault to override the protective features of the circuit breaker, resulting in sparks inside the fuel tank, ignition of fuel vapors, and consequent fire or explosion.
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Required Actions
Revise the Limitations section of the airplane flight manual (AFM) to include instructions for monitoring the low pressure lights for the center tank fuel pumps and a statement prohibiting the resetting of a tripped circuit breaker for a fuel pump in any tank.
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Compliance Time
Within 12 months of the effective date (November 1, 2005).
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Affected Aircraft
All Boeing Model 707-100 long body, -200, -100B long body, and -100B short body series airplanes; Model 707-300, -300B, -300C, and -400 series airplanes; and Model 720 and 720B series airplanes, certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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