What was found
THE HORIZONTAL STABILIZER TRIM STARTED GRINDING ON APPROACH TO MSP WITH THE AUTOPILOT ENGAGED. THE AUTOPILOT WAS TURNED OFF AND THE YOKE SWITCHES WERE ACTUATED. THE CREW HEARD THE GRINDING NOISE AGAIN IN COCKPIT AND AFT GALLEY AREA, THEN THE HORIZONTAL STABILIZER STOPPED MOVING. THE CREW TRIED TO MOVE THE STABILIZER USING THE HAND CRANK TO NO AVAIL. THE AIRCRAFT LANDED AT MSP WITHOUT INCIDENT. MAINTENANCE FOUND THE STAB TRIM SHAFT BEARING ON F/O SIDE IN THE CONTROL STAND HAD FAILED. THE LT AND RT BEARINGS WERE REPLACED IAW CMM 27-09-46. IN ADDITION, THE F/O'S STAB CONTROL WHEEL AND CONTROL STAND STAB SHAFT WERE REPLACED. OPERATIONAL CHECKS WERE GOOD.