AD Amdt-39-11060
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 737-100 | Airworthiness Directives; Boeing Model 737-100, -200, -300, -400, and -500 Series Airplanes |
Unsafe Condition
Chafing of the direct current (DC) powered float switch wiring insulation in the center fuel tank has occurred, leading to arcing from the wiring to the in-tank conduit, which could present an ignition source inside the fuel tank and consequent fire/explosion.
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Required Actions
Remove the float switch and wiring, inspect the float switch wiring in the center fuel tank for discrepancies, and either reinstall the existing float switch and wiring or replace them with new components. Install Teflon sleeving over the wiring of the float switch. Alternatively, deactivate the float switch, implement specific fueling procedures, and install Caution signs.
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Compliance Time
Before further flight
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Affected Aircraft
Boeing Model 737-100, -200, -300, -400, and -500 series airplanes.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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