What was found
DURING APPROACH INTO MSP, GEAR DOOR OPEN LIGHT REMAINED ON AFTER GEAR WAS EXTENDED. EMERGENCY GEAR EXTENSION PROCEDURES WERE UTILIZED AND AIRCRAFT LANDED WITHOUT INCIDENT. EMERGENCY EQUIPMENT WAS CALLED OUT ON STANDBY AS A PRECAUTION. FOUND LEFT MAIN INBOARD GEAR DOOR LATCH ROLLER MOUNTING BOLTS LOOSE. TIGHTENED BOLTS. ALSO, REPLACED THE RIGHT INBOARD GEAR DOOR DUE TO DAMAGE SUFFERED ON LANDING. OPERATIONAL CHECK OK ON GEAR SWING. AIRCRAFT RETURNED TO SERVICE.