As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CAPTAIN'S YOKE HAD PLAY ON CLIMB-OUT, COULD FEEL TWO INCHES OF CONTROL MOVEMENT AFTER TRIMMED. ATC DECLARED EMERGENCY. REMOVED AND REPLACED MOTOR CONTROL UNIT IAW CRJ AMM 27-42-07 AND OPERATIONAL CHECKS IAW CRJ AMM 27-40-00 WITH NO DEFECTS. PERFORMED FUNCTIONAL CHECK FLIGHT WITH NO DEFECTS. AIRCRAFT RETURNED TO SERVICE.