As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 4496, PILOT REPORTED THAT DURING TAKEOFF ROLL THE COCKPIT DOOR OPENED. RETURNED TO THE GATE, MAINTENANCE DISPATCHED, FOUND THAT THE LATCH WAS NOT PROPERLY SECURING IN THE HOLE CUTOUT FOR THE LATCH. MAINTENANCE CLEANED THE AREA AROUND THE HOLE AND RECHECKED LATCH ENGAGEMENT, LATCH ENGAGED PROPERLY AND AIRCRAFT WAS RELEASED FOR SERVICE WITHOUT FURTHER INCIDENT. AIRCRAFT HAS BEEN MODIFIED WITH SB 340-25-282, REINFORCED COCKPIT DOOR.