What was found
BOTH YOKES HAVE "SLOP" IN THEM, AND THEY WIGGLE BEFORE THE ROLL CONTROL ENGAGES. NO FLIGHT CONTROL ISSUES. REMOVED FROM SERVICE. INSPECTED AND FOUND CONTROL COLUMN CHAINS EXCESSIVELY LOOSE. ADJUSTED PILOTS AND CO-PILOTS CONTROL COLUMN CHAINS IAW DHC-8-400 MM TASK# 27-31-01-820-801. PILOTS AND CO-PILOTS CONTROL WHEELS NOW OPERATE NORMALLY. COMPLETED FREEDOM OF MOVEMENT CHECK, ENSURED FULL TRAVEL AND VERIFIED PROPER DIRECTION OF MOVEMENT, NO DEFECTS NOTED PER GPM 9.2 (FREEDOM OF MOVEMENT CHECK). RETURNED TO SERVICE.