As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER DEPARTURE FROM MSP ON GEAR RETRACTION, THE LEFT MAIN RED IN TRANSIT LIGHT REMAINED ILLUMINATED AND DID NOT EXTINGUISH. CYCLED GEAR WITH NO CHANGE, AIRCRAFT RETURNED TO MSP. MAINTENANCE CLEANED AND LUBED UPLOCKS FOR GEAR AND DOOR. ALL CHECKS GOOD.