20000508023359I

(.19)On may 8, 2000, at 2137 EDT, a Beech BE-58, N9044V, operated by U.S. Checks, suffered minor damage from an electrical fire, shortly after departing Bradley International Airport (bdl), Windsor Locks, Connecticut. The certificated commerical pilot was not injured, and visual meteorological conditions prevailed at the time of the incident. An instrument flight rules flight plan was filed for the flight, between bradely and stewart international airport (swf), newburgh, new york. The cargo flight was conducted under 14 CFR part 135. According to a federal aviation administration (FAA) inspector, the pilot smelled smoke after takeoff. The airplane returned to Bradley, landed, and taxied to the ramp. During the postfligth inspection, the rotating beacon power wire was found to be burnt, the entire lenght of the airplane. Further inspection revealed that a holding screw for the rotating beacon switch/circuit breaker was too long, and it had fractured the switch. (-23)a/c departed bdl for the swf airport. During intial climbout, the pilot smelled smoke and returned to bdl. The air net maintenance department said that the rotating beacon had failed, but the switch/circuit breaker failed to trip. Further investigation found that the switch may have been broken on due to screw contact from the panel. A safety recommendation has been submitted to AAI-200. (.4) on may 8, 2000, at 2137 eastern daylight time, a Beech BE-58, N9044V, operated by U.S. Check, suffered minor damage from an electrical fire, shortly after departing Bradley International Airport (bdl), Windsor Locks, Connecticut. The certificated commercial pilot was not injured, and visual meteorological conditions prevailed at the time of the incident. An instrument flight rules flight plan was filed for the flight, between Bradley and stewart international airport (swf), newburgh, new york. The cargo flight was conducted under 14 CFR part 135. According to a federal aviation administration (FAA) inspector, the pilot smelled smoke after takeoff. The airplane returned to Bradley, landed, and taxied to the ramp. During the postflight I nspection, the rotating beacon power wire was found to be burnt, the entire length of the airplane. Further inspection revealed that a holding screw for the electroluminescent panel had contacted the rotating beacon switch/circuit breaker, and fractured part of the unit. The switch function was determined to still operate properly, but the circuit breaker had failed. The initiating event was suspected to be a failed beacon motor, which then initiated a short circuit; however, it was not positively confirmed. The switch/breaker was attached to a solid buss bar behind the panel, and the screw in question was one of five used to hold the panel in place. Each of the four other screws was located at a corner of the panel, while the fifth screw was located directly below the toggle portion of the switch. The Beechcraft illustrated parts catalog called for the use of an AN5158632R screw, but did not give a dash number for the screw's length. The FAA inspector submitted safety recommendations to the FAA recommendation and quality assurance division, AAI-200, for a fleetwide inspection of existing switches, for the manufacturer to revise the parts catalogue to reflect screw length, and for the manufacturer to move the screw position on future airplanes.