As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, THE AIRCRAFT WOULD NOT PRESSURIZE. FOUND THE R1 DOOR TOP CORNER NOT LATCHED PROPERLY. RECLOSED DOOR AND PERFORMED OPERATIONAL CHECK OF DOOR AND PRESSURIZATION. OPERATIONALLY CHECKED GOOD IN ACCORDANCE WITH MAINTENANCE MANUAL 2100 AND 5200.