As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLAPS FAILED TO RETRACT. UPON DISASSEMBLY OF THE FLAP ACTUATOR ASSEMBLY (GEAR REDUCTION DRIVE), THE SHAFT OF PART 5115241-3 WAS FOUND SHEARED JUST FORWARD OF THE GEAR. THIS ALLOWED THE OUTPUT SHAFT TO WOBBLE IN BEARING MS 20201KP8A EVENTUALLY SHEARING ALL OF THE TEETH OFF OF THE SMALL MESHING PART OF GEAR ASSEMBLY 5115244-2.