AD 2009-05-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 727 | Airworthiness Directives; Boeing Model 727 Airplanes |
Unsafe Condition
An electrical fault in the fuel pump system might cause a connector or end cap to burn through and a subsequent fire or explosion inside the fuel pump or wing spar area. Uncommanded operation of the auxiliary fuel tank pumps can cause them to run dry, increasing pump temperature and potentially supplying an ignition source to fumes in the fuel tank, which can result in a fire or explosion.
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Required Actions
Install new ground fault interrupter (GFI) relays for the main fuel tanks and the auxiliary fuel tank pumps. Revise the FAA-approved maintenance program to incorporate new Airworthiness Limitations for the GFI of the boost pumps and for the uncommanded on system for the auxiliary fuel tank pumps.
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Compliance Time
Within 60 months after the effective date of the AD
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Affected Aircraft
Boeing Model 727, 727C, 727-100, 727-100C, 727-200, and 727-200F series airplanes, certificated in any category; as identified in Boeing Alert Service Bulletin 727-28A0128, dated April 4, 2008.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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