AD 2006-05-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 777-200 | Airworthiness Directives; Boeing Model 777-200 Series Airplanes |
Unsafe Condition
Energy from a lightning strike on the bushing for the sump drain valve could arc to the inside of the center fuel tank wall, creating an ignition source in the fuel tank and resulting in a fuel tank explosion.
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Required Actions
Install a new washer between the lower wing surface and the jam nut of the sump drain valve assembly in both wings, in accordance with the Accomplishment Instructions of Boeing Special Attention Service Bulletin 777-28-0045.
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Compliance Time
Within 60 months after the effective date of this AD.
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Affected Aircraft
Boeing Model 777-200 series airplanes, certificated in any category, as identified in Boeing Special Attention Service Bulletin 777-28-0045, dated September 1, 2005.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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