What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
Cabin door departed the aircraft at 4000 feet during climbout approx 7 miles from the departure airport. There were no injuries and only minor damage to the aircrafat. Investigation shows that the pilot in command (PIC) allowed a passenger to close the cabin door so that the pci could start the engines and get the air conditioning started cooling sooner. The PIC, while seated in the cockpit, said he was watching the cabin door warning light on the caution panel, that he depended on it to confirm door close. PIC said he did not check the position of the door handle or any of the view windows after the passenger shut the cabin door. The passenger, operating the door for the first time ever, shut the door as instructed by the PIC and says he checked that the latch pins appeared in the small windows in the door. The cabin door was recovered intact the next day. There was no damage to the latching mechanism, or to any of the latch pins, latch hooks, or door jamb latch rollers, privacy data omitted .
As the FAA filed it
CABIN DOOR DEPARTED THE AIRCRAFT AT 4000 FEET DURING CLIMBOUT APPROX 7 MILES FROM THE DEPARTURE AIRPORT. THERE WERE NO INJURIES AND ONLY MINOR DAMAGE TO THE AIRCRAFAT. INVESTIGATION SHOWS THAT THE PILOT IN COMMAND (PIC) ALLOWED A PASSENGER TO CLOSE THE CABIN DOOR SO THAT THE PCI COULD START THE ENGINES AND GET THE AIR CONDITIONING STARTED COOLING SOONER. THE PIC, WHILE SEATED IN THE COCKPIT, SAID HE WAS WATCHING THE CABIN DOOR WARNING LIGHT ON THE CAUTION PANEL, THAT HE DEPENDED ON IT TO CONFIRM DOOR CLOSE. PIC SAID HE DID NOT CHECK THE POSITION OF THE DOOR HANDLE OR ANY OF THE VIEW WINDOWS AFTER THE PASSENGER SHUT THE CABIN DOOR. THE PASSENGER, OPERATING THE DOOR FOR THE FIRST TIME EVER, SHUT THE DOOR AS INSTRUCTED BY THE PIC AND SAYS HE CHECKED THAT THE LATCH PINS APPEARED IN THE SMALL WINDOWS IN THE DOOR. THE CABIN DOOR WAS RECOVERED INTACT THE NEXT DAY. THERE WAS NO DAMAGE TO THE LATCHING MECHANISM, OR TO ANY OF THE LATCH PINS, LATCH HOOKS, OR DOOR JAMB LATCH ROLLERS, ^PRIVACY DATA OMITTED^ .