As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DEBRIEFED THE CAPT..WITH THE AUTO PILOT OFF, WHEN YOKE IS RELEASED THE AIRCRAFT GOES TO 1 UNIT LEFT WING DOWN. WITH CONTROL YOKE HELD CENTERED, AIRCRAFT FLY''S STRAIGHT. IT FEELS LIKE A SPRING FORCE IS DRIVING THE YOKE LEFT WING DOWN WHEN RELEASED FROM CENTER. LOCKED FOR SIGNOFF UNLOCKING FOR SIGNOFF PERFORMED FIM TASK 27-11-00 TASK 810. NO DEFECTS NOTED AT THIS TIME.