As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMBOUT, GEAR DOORS NOT LATCHED LIGHT WOULD NOT EXTINGUISH ON GEAR RETRACTION. LANDING GEAR WAS CYCLED AND THE DOORS LIGHT EXTINGUSHED. AFTER LANDING TOL, MAINTENANCE FOUND AND SECURED THE RIGHT HAND MAIN LANDING GEAR DOOR UPLATCH SWITCH. MAINTENANCE ACCOMPLISHED THE CORRECTIVE ACTION AND OPERATIONAL CHECK IN ACCORDANCE WITH THE DOUGLAS M/M 32-10-2 AND 32-60-0. THE AIRCRAFT WAS RETURNED TO SERVICE.