As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED THAT THE MLG DOOR INDICATION WAS FLASHING AFTER THEY SELECTED GEAR UP. CREW FOLLWED THE QRH AND RETURNED TO DEPARTURE. AN EMERGENCY WAS NOT DECLARED AND CREW LANDED WITHOUT INCIDENT. MAINTENANCE RERIGGED THE ALTERNATE EXTENSION SYS OF THE DOORS IAW AMM AND OPS CHECKED GOOD. ACFT IS GOOD FOR SERVICE.