As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT DEPARTED AND AFTER SELECTING GEAR UP, MLG DOORS WOULD NOT RETRACT. AIRCRAFT RETURNED TO DEPARTURE AIRPORT. FERRIED AIRCRAFT FOR MAINTENANCE. LANDING GEAR RELAY 6G (SEQUENCE) WAS FOUND DEFECTIVE. REMOVED AND REPLACED RELAY. LANDING GEAR RETRACTION TEST ON JACKS OK. (X)