What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
Pilot/owner recently purchased aircraft. During takeoff from runway 13L at bfi, the door came open. The pilot elected to abort the takeoff. Pilot stated that he did not over run onto the active runway, but rather onto the over-run at the south end of the runway. Pilot stated that following maintenance inspection after ine incident, it was determined that the door seal came loose due to inproper installation, which in turn caused the top latch to release.
As the FAA filed it
PILOT/OWNER RECENTLY PURCHASED AIRCRAFT. DURING TAKEOFF FROM RUNWAY 13L AT BFI, THE DOOR CAME OPEN. THE PILOT ELECTED TO ABORT THE TAKEOFF. PILOT STATED THAT HE DID NOT OVER RUN ONTO THE ACTIVE RUNWAY, BUT RATHER ONTO THE OVER-RUN AT THE SOUTH END OF THE RUNWAY. PILOT STATED THAT FOLLOWING MAINTENANCE INSPECTION AFTER INE INCIDENT, IT WAS DETERMINED THAT THE DOOR SEAL CAME LOOSE DUE TO INPROPER INSTALLATION, WHICH IN TURN CAUSED THE TOP LATCH TO RELEASE.