AD 2013-25-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company | Airworthiness Directives; The Boeing Company Airplanes |
Unsafe Condition
Damage to the fuel pumps caused by electrical arcing that could introduce an ignition source in the fuel tank, which, 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 fuel pump power control relays with new relays having a ground fault interrupter (GFI) feature, install ground studs and a bonding jumper, perform bonding resistance measurements, and change the GFI relay position. Also, revise the maintenance program to incorporate certain airworthiness limitations.
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Compliance Time
Within 60 months after the effective date of this AD
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Affected Aircraft
The Boeing Company Model 737-300, -400, and -500 series airplanes; certificated in any category; identified as Groups 5, 6, 7, and 9 in Boeing Alert Service Bulletin 737-28A1212, Revision 2, dated October 18, 2012.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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