As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ON APPROACH FLAPS SELECTED FROM 10 TO 20 AS FLAPS TRAVELLED THROUGH APPROXIMATELY 15 DEGREES THE FORWARD FLAP MOTOR FAILED AND BROKE FREE OF THE TRANSMISSION/JACKSCREW ASSY. THIS CAUSED THE FLAP ACTUATOR ASSEMBLY TO BRAKE FREE OF THE ATTACHING STRUCTURE, THUS CAUSING THE FLAP TO RAPIDLY RETRACT TO THE STOWED POSITION.