AD 61-19-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 720 Series | BOEING Model 720 Series Aircraft |
| aircraft | The Boeing Company | 720B Series | BOEING Model 720 Series Aircraft |
Unsafe Condition
Faults in the fuel dump chute safety switch (Micro P/N 5EN11-6) have caused burning of the lead wires at the switch and, in one case, allowed fuel to leak through the dump chute secondary seal due to the fuel dump valve cycling open and close.
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Required Actions
Conduct daily inspections of the fuel dump chute safety switch to check for burned or charred wires. Replace the safety switch with improved type Micro P/N 5EN11-6B within 350 hours' time in service after the effective date. Discontinue daily inspections after installing the improved switch.
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Compliance Time
within 10 days after the effective date for initiating daily inspections, and within 350 hours' time in service after the effective date for replacing the switch
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Affected Aircraft
Boeing Model 720 Series Aircraft which have not previously been modified with Micro P/N 5EN11-6B
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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