What was found
PILOT REPORTED THAT ON APPROACH TO PHX FO NOTICED A SYNTHETIC BURNING SMELL BRIEFLY, THEN GOT A BATT TIE ANNUNCIATOR LIGHT. MAINTENANCE INSPECTED THE ELECTRICAL SYSTEM AND FOUND CIRCUIT BOARD A130 HAD A BURNT DIODE, REPLACED BOARD IAW AIM 10-24-01, RAN AIRCRAFT, ALL OPERATIONS NORMAL.