AD Amdt-39-11416
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 737-100 | Airworthiness Directives; Boeing Model 737-100, -200, -300, -400, and -500 Series Airplanes |
Unsafe Condition
Incidents of electrical fire during fueling due to a short circuit and overheating of a transient suppression diode.
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Required Actions
Install a transient suppression diode in the wiring circuit of the refueling valve-to-float switch for certain airplanes. Replace the existing transient suppression diode with an improved diode for other airplanes. Conduct a functional test to verify proper installation and take corrective action if necessary.
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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.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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