As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PERFORMED AN AIR TURN BACK DUE TO CREW REPORTING UNABLE TO RETRACT LEFT MAIN LANDING GEAR WITH ASSOCIATED GEAR DOOR AND GEAR DISAGREE INDICATIONS. MAINTENANCE FOUND A FAILED LEFT MAIN LANDING GEAR SIDE BRACE ACTUATOR. REPLACED THE ACTUATOR AND OPS CHECKED THE LANDING GEAR, FOUND NORMAL.