AD 2005-12-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 757-200 | Airworthiness Directives; Boeing Model 757-200 Series Airplanes |
Unsafe Condition
A frequency converter failure mode not identified in the original system design could result in a short circuit between the frequency converter output and the distribution circuit breakers, leading to overheating and failure of adjacent wiring and degraded operation of airplane systems.
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Required Actions
Modify the frequency converters located in the closet assembly in the passenger compartment by following the Accomplishment Instructions of Boeing Service Bulletin 757-25-0255. For Group 1 airplanes identified in Boeing Service Bulletin 757-24-0093, modify the in-flight entertainment system prior to or concurrently with the frequency converter modification.
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Compliance Time
Within 18 months after the effective date of this AD.
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Affected Aircraft
Boeing Model 757-200 series airplanes, certificated in any category, as listed in Boeing Service Bulletin 757-25-0255, dated December 11, 2003.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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