As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) THE ACFT ENCOUNTERED A FLAP FAILURE AFTER DEPARTURE. THE FLIGHT CREW ELECTED TO RETURN AS A PRECAUTION. FOUND TORQUE TUBE AT OUTPUT OF RT INBD FLAP ACTUATOR IMPROPERLY INSTALLED. TORQUE TUBE REINSTALLED. DRIVE LINE INSPECTION CARRIED OUT IAW AMM 27-51-00. FLAP CONTROL SYS MECHANICAL/ELECTRICAL RIGGING ACCOMPLISHED IAW AMM 27-50-00-820 FLAP FUNCTION NORMAL.