As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ACFT DEPARTED AT 1112Z, AFTER TAKEOFF, LANDING GEAR WAS RETRACTED AND THE RED GEAR UNSAFE LIGHT WOULD NOT GO OUT. PILOT CYCLED GEAR WITH NO CHANGE. PUT GEAR BACK DOWN AND LANDED WITHOUT INCIDENT. MX DETERMINED THAT THE CAUSE WAS THE UPLOCK INDICATION SWITCHES WERE OUT OF ADJUSTMENT. ADJUSTMENT WAS MADE IAW THE MM AND THE ACFT WAS RETURNED TO SERVICE.