As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 5740 - AFTER TAKEOFF FROM PIT RECEIVED GEAR UP DISAGREE WARNING MESSAGE AND LEFT MAIN GEAR IN RED. PERFORMED QRH AND RETURNED TO PIT. LANDED WITHOUT INCIDENT. FOUND LEFT MAIN LANDING GEAR UPLOCK SENSOR OUT OF ADJUSTMENT. RE-ADJUSTED UP LOCK SENSOR.