What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
Pilot cleared by ccr ATCT for takeoff on runway 32R. Pilot departed normally, when at 400 feet AGL the door warning illuminated and the cargo separated from the aircraft approximately 15 seconds later. Interview with the pilot revealed that the checklist and preflight procedures were followed. On engine start and taxi out there was no cockpit indication of a door warning. The door warning illumination occurred at 400 feet AGL.
As the FAA filed it
PILOT CLEARED BY CCR ATCT FOR TAKEOFF ON RUNWAY 32R. PILOT DEPARTED NORMALLY, WHEN AT 400 FEET AGL THE DOOR WARNING ILLUMINATED AND THE CARGO SEPARATED FROM THE AIRCRAFT APPROXIMATELY 15 SECONDS LATER. INTERVIEW WITH THE PILOT REVEALED THAT THE CHECKLIST AND PREFLIGHT PROCEDURES WERE FOLLOWED. ON ENGINE START AND TAXI OUT THERE WAS NO COCKPIT INDICATION OF A DOOR WARNING. THE DOOR WARNING ILLUMINATION OCCURRED AT 400 FEET AGL.