What was found
ORD - FLT 4165 - DURING APPROACH, CREW REPORTED THE FLAPS FAILED/STOPPED AT 3 DEGREES. AN EMERGENCY DECLARED AND NO FLAP LANDING WAS SAFELY COMPLIED WITH. WHILE TROUBLESHOOTING FLAP SYSTEM MAINTENANCE FOUND THE CANNON PLUG ON THE NR 1 FLAP DRIVE LOOSE. CANNON PLUG WAS RECONNECTED AND FLAPS WERE CYCLED MULTIPLE TIMES. OPERATIONAL CHECK WAS GOOD AND AIRCRAFT WAS RETURNED TO SERVICE. (M)