Airworthiness Directive · Amendment 39-14127 · Boeing Model 757-200 Series Airplanes
Boeing Model 757-200 Series Airplanes
This AD applies to Model 757-200 series airplanes, certificated in any category, as listed in Boeing Service Bulletin 757-25-0255, dated December 11, 2003.
The FAA is adopting a new airworthiness directive (AD) for certain Boeing Model 757-200 series airplanes. This AD requires modifying the frequency converters located in the closet assembly in the passenger compartment, and making various wiring changes in and between the closet assembly and forward purser work station. This AD also requires modifying the in-flight entertainment system prior to or concurrently with the modification of the frequency converters. This AD is prompted by a certification review that revealed a frequency converter failure mode not identified in the original system design. We are issuing this AD to prevent a short circuit between the frequency converter output and the distribution circuit breakers, which could result in overheating and failure of adjacent wiring and consequent adverse effects on other systems sharing the affected wire bundle.
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
For all airplanes: Within 18 months after the effective date of this AD modify the frequency converters located in the closet assembly in the passenger compartment by doing all the applicable actions in accordance with the Accomplishment Instructions of Boeing Service Bulletin 757-25-0255, dated December 11, 2003.
For Group 1 airplanes identified in Boeing Service Bulletin 757-24-0093, dated August 14, 2003: Before or concurrent with accomplishment of paragraph (f) of this AD, modify the in-flight entertainment system by doing all the applicable actions in accordance with Boeing Service Bulletin 757-24-0093, dated August 14, 2003.
As of the effective date of this AD, no person may install a frequency converter having part number 1-002-0102-0730 on any airplane unless that frequency converter has been modified as required by paragraph (f) of this AD.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
Aircraft
