As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB-OUT FROM KDFW TO KIAH, AFTER GEAR RETRACTION THE CREW NOTICED DOOR NOT LATCH LIGHT STAYED ON UNTIL THE CREW RECYCLED THE GEARS AND LIGHT WENT OUT. CREW LANDED AT KIAH WITHOUT INCIDENT. MAINTENANCE INSPECTED MAIN LANDING GEAR DOOR TARGET AND STRIKERS, CLEANED OPERATIONAL CHECK GOOD IAW DC8 MAINTENANCE MANUAL 32-60-0. AIRCRAFT WAS RETURNED TO SERVICE.