What was found
PILOT PERFORMING COCKPIT CHECKS NOTED NO VOLTAGE INDICATION FOR NR 2 BATTERY. MAINTENANCE PERSONNEL ENTERED REAR EQUIPMENT BAY AND SMELLED SMOKE. INVESTIGATION REVEALED BURNED WIRES BY THE EMERGENCY BATTERY CONTACTOR. FURTHER INVESTIGATION FOUND BRAIDED WIRE OF 2 POWER DIODES CONTACTING. FOUND A LARGE COAXIAL CABLE PUSHING ON ONE OF THE POWER DIODES WIRING, FORCING IT TO CONTACT THE SECOND POWER DIODE WIRING THUS CAUSING A HIGH CURRENT DRAW AND IN TURN MELTED WIRES BY THE EMERGENCY BATTERY CONTACTOR. REPLACED THE 2 DIODES AND EMERGENCY CONTACTOR. REPAIRED THE DAMAGED WIRES, REPOSITIONED AND SECURED THE COAXIAL CABLE AWAY FROM THE DIODES. SYSTEM FUNCTION TESTED SATISFACTORY. HAWKER BEECHCRAFT TECHNICAL REP COPIED ON THIS INCIDENT. REFERENCE PENTA AVIATION W/O 3561-1.03 FOR FULL DETAILS .