As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) THE ELEVATOR SERVO MOTOR WAS RECEIVED IN REPAIRED CONDITION AND INSTALLED, AFTER 3.2 HRS THE CREW WAS CARRYING OUT THE PREFLIGHT FLIGHT CONTROL CHECK AND A LOUD GRINDING NOISE WAS COMING FROM THE AFT PART OF THE ACFT. MAINTENANCE REMOVED THE SERVO MOTOR AND REPLACED WITH A SERVICEABLE UNIT.