As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DLH - DURING APPROACH, LANDING GEAR DOOR OPEN LIGHT REMAINED ON AFTER GEAR WAS EXTENDED FOR LANDING. FLIGHT RETURNED TO MSP AND LANDED WITHOUT INCIDENT. EMERGENCY GEAR EXTENSION PROCEDURES WERE UTILIZED FOR LANDING. REPLACED THE LEFT MAIN GEAR DOOR SWTICH AND CYCLED GEAR DOORS SEVERAL TIMES. OPERATIONAL CHECK OK AND AIRCRAFT RETURNED TO SERVICE.