As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER DEPARTURE FROM PSM ON FLIGHT 8200 PILOT TRIED TO RETRACT GEAR. THE RIGHT MAIN GEAR REMAINED DOWN. AIRCRAFT RETURNED TO PSM WITHOUT INCIDENT. MAINTENANCE FOUND THE RIGHT MAIN GEAR DOOR ACTUATOR FROZEN. THE ACTUATOR WAS REPLACED AND OPERATIONALLY CHECKED PER THE BOEING MAINTENANCE MANUAL 32-32-81. AIRCRAFT WAS RETURNED TO SERVICE.