As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NR 6573 - IAD-RDU - DURING CLIMB-OUT RETURNED TO IAD DUE TO THE RED GEAR HANDLE LIGHT REMAINED ILLUMINATED WHEN GEAR SELECTED UP. AIRCRAFT RETURNED TO IAD WITH NO FURTHER INCIDENT. MAINTENANCE REPLACED LEFT MAIN UPLOCK MICROSWITCH. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (M)