As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLT - FLT 1263 - AFTER TAKEOFF GSP, LEFT LANDING GEAR RED LIGHT REMAINED ON. CREW RECYCLED NO HELP. LIGHT FLICKERED OFF AND ON THROUGHOUT FLIGHT. FLIGHT LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE ADJUSTED LEFT GEAR UPLOCK SENSOR. SENSOR TEST PER MM 32-61-0 CHECKS OK. (W)