AD 2005-12-10
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 747-200F and -400 | Airworthiness Directives; Boeing Model 747-200F and -400 Series Airplanes; Model 767-400ER Series Airplanes; and Model 777 Series Airplanes |
Unsafe Condition
A hard short condition between the frequency converter's output and its downstream circuit breakers will produce a continuous current that could cause the undersized output wiring to overheat, potentially leading to the failure of a wire bundle and adverse effects on other systems sharing the affected wire bundle.
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Required Actions
Replace the frequency converter(s) used to supply electrical power for utility outlets with modified frequency converter(s). Perform any specified action and related concurrent actions as necessary.
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Compliance Time
Before further flight
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Affected Aircraft
Boeing Model 747-200F and -400 series airplanes; Model 767-400ER series airplanes; and Model 777 series airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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