What was found
CREW RECEIVED NUMEROUS MESSAGES, AVNX MAU 3B FAIL, SPOILER FAULT, RUDDER FAIL, RT ELEV FAIL AND ENG 1 & ENG 2, NO DISPATCH. CREW RAN THE QRH, DISCONNECTED THE AUTOPILOT AN DECLARED AN EMERGENCY. LANDED WITHOUT INCIDENT. FIRE DEPARTMENT ADVISED THE OTBD BRAKE TEMPS WERE READING ABOUT 1200 DEGREES WHILE INBD WERE MUCH LOWER, NORMAL. MAINTENANCE TROUBLESHOT AND FOUND THE NIC PROXIMITY 6 HAD FAILED. MAINTENANCE R & R THE NIC PROXIMITY 6 IAW AMM AND OPS CHECKED GOOD. ACFT IS GOOD FOR SERVICE.