As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MADE AN AIR RETURN BACK TO DEPARTURE. PILOT REPORTED VIA VHF1: RECEIVED FLAPS LOCKED MESSAGE DURING CLIMB OUT. FLAPS REMAINED LOCKED BETWEEN 0 AND 1 POSITION. CREW PERFORMED QRH AND FLAPS REMAINED LOCKED. CREW PERFORMED AN AIR RETURN WHERE AN EMERGENCY WAS DECLARED AND QRH PROCEDURE WAS ACCOMPLISHED FOR FLAPS LOCKED. TROUBLESHOT AND FOUND FLAP ACTUATOR NR 3 AT FAULT. ACCOMPLISHED R & R FLAP ACT NR 3, ITEM NR 2.