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Thu, Nov 24, 2005

AD: Boeing

AD NUMBER: 2005-24-04
MANUFACTURER: Boeing
SUBJECT: Airworthiness Directive 2005-24-04
SUMMARY:
The FAA is adopting a new airworthiness directive (AD) for certain Boeing Model 767-300 series airplanes. This AD requires replacing the frequency converters used to supply power for medical and galley utility outlets with modified frequency converters, and related actions. This AD results from a report indicating that a hard short circuit condition between the output of certain frequency converters and their downstream circuit breakers will produce a continuous output current that could cause the undersized output wiring to overheat when the frequency converters fail to shutoff. We are issuing this AD to prevent overheating of the output wiring of the frequency converters, which could result in the failure of a wire bundle and consequent adverse effects on other systems sharing the affected wire bundle.

FMI: www.faa.gov/regulations_policies/airworthiness_directives/

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