What was found
ON FLIGHT 3531 DURING CRUISE THE CREW REPORTED A BRAKE OVERHEAT WARNING MESSAGE REGARDING THE NR 4 BRAKE TEMPERATURE. THE CREW FOLLOWED PROCEDURES PER THE BOOK AND DECLARED AN EMERGENCY. THE AIRCRAFT LANDED SAFELY AT CLE. THE AIRCRAFT WAS REMOVED FROM SERVICE. TROUBLESHOT SYSTEM PER FIM 32-46-00 AND PERFORMED MEGGAR CHECK BETWEEN A165P1 PIN 55 TO TC 09P1 PIN A AND A165P1 PIN 56 TO TC 091 PIN C. NO DEFECTS NOTED. SWAPPED NR 3 AND NR 4 BRAKE TEMPERATURE SENSOR IAW CRJ AMM 32-4601. THE OPERATIONAL CHECK WAS GOOD. CLEANED CONNECTIONS AND INSPECTED IAW CRJ WIRING MANUAL 20-26-00 AND NO DEFECTS WERE NOTED. PART NUMBER 6007300 AND SERIAL NUMBER JAN030765 WAS ON NR 4 NOW AND ON NR 3 AND SERIAL NUMBER MAR020541 IS NOW ON NR 4 WAS IN THE NR 3 POSITION. PARTS SWAPPED ONLY. THE AIRCRAFT WAS RETURNED TO SERVICE.