Transport i infrastruktura · 5.11.2004
Airworthiness Directives; Boeing Model 757 Airplanes
The FAA proposes to adopt a new airworthiness directive (AD) for certain Boeing Model 757 airplanes. This proposed AD would require inspections of certain wire bundles in the left and right engine-to- wing aft fairings for discrepancies, and other specified and corrective actions. This proposed AD is prompted by a report indicating that a circuit breaker for the fuel shutoff valve tripped due to a wire that chafed against the structure in the flammable leakage zone of the aft fairing, causing a short circuit. We are proposing this AD to prevent chafing between the wire bundle and the structure of the aft fairing, which could result in electrical arcing and subsequent ignition of flammable vapors and possible uncontrollable fire.