What was found
SQUAWK - BURNING SMELL IN CABIN AND NR 2 NAV/COMM STOPPED WORKING. CONFIRMED PROBLEM. REMOVED NR 2 KX165 NAV/COMM P/N 069-1025-25, S/N 58039. FOUND F401 OPEN IN POWER SUPPLY CIRCUIT. POWER SUPPLY INPUT SHORTED TO GROUND. TROUBLESHOT POWER SUPPLY CIRCUIT. TRACED PROBLEM TO SHORTED POWER TRANSFORMER. REPLACED T400 AND F401 (P/N 019-06019-000) AND (P/N 036-00058-0006). MADE MINOR ADJUSTMENTS TO VOR/LOC CONVERTER. FUNCTION TESTED UNIT PER MM. UNIT TESTED GOOD. RE-INSTALLED UNIT IN AIRCRAFT. NAV/COMM CHECKED GOOD.