As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 539 - PIT-GSO - AFTER TAKEOFF MAIN GEAR RED LIGHTS WOULD NOT GO OUT. PERFORMED ABNORMAL PROCEDURE. THIS CONFIRMED UNLOCKED GEAR DOOR. FLIGHT RETURNED TO PIT WITHOUT FURTHER INCIDENT. MAINTENANCE LUBRICATED BOTH MAIN LANDING GEARS. PERFORMED SEVERAL GEAR SWINGS. ALL OPERATIONS NORMAL. (M)