As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THERE WAS ZERO BACKLASH IN THE ENCODER MODULE GEAR MESH. THE O/H MANUAL CALLS OUT ONE-QUARTER TO ONE-HALF TOOTH WIDTH BLACKLASH IN THIS MESH. WHEN THE BACKLA SH IS ZERO, A VERY SLIGHT CHANGE IN TEMPERATURE CAN CAUSE THE ENCODER TO HANG UP.