As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) FLIGHT CREW REPORTED ON APPROACH WHILE EXTENDING THE FLAPS FROM 15 TO 20 THEY WERE PROMPTED WITH A FLAP DISAGREE MESSAGE. THE CREW EXECUTED A GO-AROUND AND LANDED WITHOUT ISSUE ON THE SECOND APPROACH. ALT FLAPS RESET FLAPS INSPECTED, NO FAULTS FOUND FLAPS OPERATED SEVERAL TIMES NO FAULTS CONSIDERED SERVICABLE.