As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER T/O, O/B FLAPS FROZE AT 15 FOR A FEW SECONDS THEN WENT TO 5. O/B FLAPS DID NOT EXTEND FOR LANDING. PER PILOT REPORT AN EMERGENCY WAS DECLARED. FOUND O/B FLAP HYD DRIVE MOTOR AT FAULT. MOTOR AND CASE DRAIN CHECK VALVE WERE REPLACED PER M/M.