As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAKEOFF UPON GEAR RETRACTION THE "GEAR DISAGREE" AND "GEAR DOORS" EICAS MESSAGE DISPLAYED AND THE "GEAR" AND "DOORS" LIGHT ILLUMINATED. THE ACFT RETURNED TO DEPARTURE WHERE IT LANDED WITHOUT INCIDENT. POST FLIGHT INSP WAS PERFORMED, THE RT MLG RETRACT ACTUATOR WAS DETERMINED TO BE AT FAULT. R & R ACTUATOR, PERFORMED OPS AND LEAK CHECKS GOOD. NO OTHER DEFECTS WERE NOTED. ACFT WAS RETURNED TO SERVICE.