What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
During descent into kilm after the two hour mark at approximately 13:51 CST at FL18900.
The PIC experienced a a loud bang followed by a immediate rush of air he immediately conducted emergency proceeder to begin a rapid decent.
At this time the pilot declared an emergency with jacksonville center the PIC selected kcpc was a suitable alternate airport.
After landing the PIC inspected the cabin to see which window "blew" it was noted that the cabin door had departed the aircraft.
Upon further inspection by the PIC and FAA inspector it was determined that the door had not struck the airframe.
As the FAA filed it
DURING DESCENT INTO KILM AFTER THE TWO HOUR MARK AT APPROXIMATELY 13:51 CST AT FL18900.
THE PIC EXPERIENCED A A LOUD BANG FOLLOWED BY A IMMEDIATE RUSH OF AIR HE IMMEDIATELY CONDUCTED EMERGENCY PROCEEDER TO BEGIN A RAPID DECENT.
AT THIS TIME THE PILOT DECLARED AN EMERGENCY WITH JACKSONVILLE CENTER THE PIC SELECTED KCPC WAS A SUITABLE ALTERNATE AIRPORT.
AFTER LANDING THE PIC INSPECTED THE CABIN TO SEE WHICH WINDOW "BLEW" IT WAS NOTED THAT THE CABIN DOOR HAD DEPARTED THE AIRCRAFT.
UPON FURTHER INSPECTION BY THE PIC AND FAA INSPECTOR IT WAS DETERMINED THAT THE DOOR HAD NOT STRUCK THE AIRFRAME.