AD 2011-20-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company Model 737-600 | Airworthiness Directives; The Boeing Company Model 737-600, -700, -700C, -800, and -900 Series Airplanes |
Unsafe Condition
Pump housing burn-through due to electrical arcing, which could create a potential ignition source inside a fuel tank. This condition, in combination with flammable fuel vapors, could result in a fuel tank explosion and consequent loss of the airplane.
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Required Actions
Replace the power control relays in the P91 and P92 power distribution panels for the fuel boost and override pumps with new, improved relays having a ground fault interrupter (GFI) feature, or install and maintain universal fault interrupters (UFIs) using a certain supplemental type certificate. Specify which relays may be replaced by GFIs or UFIs.
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Compliance Time
Before further flight
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Affected Aircraft
The Boeing Company Model 737-600, -700, -700C, -800, and -900 Series Airplanes
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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