As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 6173 - IAD-HVN - MADE AN UNSCHEDULED LANDING DUE TO LEFT RED INTRANSIT LIGHT REMAINED ON FOLLOWING GEAR UP. AIRCRAFT RETURNED TO GATE WITH NO FURTHER INCIDENTS. MAINTENANCE REMOVED AND REPLACED UPLOCK MICROSWITCH, OPS CHECK OK. AIRCRAFT WAS RELEASED AND RETURNED TO SERVICE. (M)