What was found
(CAN)DURING FLIGHT WHEN ENTERING ICING CONDITIONS, CREW SELECTED ENGINE INTAKE BYPASS DOOR OPEN. LEFT HAND EMERGENCY FUEL SHUTOFF VALVE CLOSED AND ENGINE SHUTDOWN. INSPECTION INDICATED THAT 115 VOLT AC INTAKE HEAT WIRE HAD SHORTED ON A HARNESS SUPPORT TRAY UNDER THE FLOOR AT PASSENGER SEAT, ROW 3. THE SHORTED WIRE HAD CAUSED A WIRE BUNDLE TO BURN.