What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
On 8 November 2011, at approximately 1100 hrs MST, during climb out from Cheyenne (cys) airport, WY, N39EH, a Piper model PA-31T Cheyenne aircraft sustained substantial damage when the cabin entry door departed the aircraft at approximately 8500 feet mean sea level (MSL). The aircraft returned to Cheyenne airport and made an uneventful landing. There were no injuries to the four occupants on board. Weather at the time was visual meteorological conditions (VMC).
As the FAA filed it
ON 8 NOVEMBER 2011, AT APPROXIMATELY 1100 HRS MST, DURING CLIMB OUT FROM CHEYENNE (CYS) AIRPORT, WY, N39EH, A PIPER MODEL PA-31T CHEYENNE AIRCRAFT SUSTAINED SUBSTANTIAL DAMAGE WHEN THE CABIN ENTRY DOOR DEPARTED THE AIRCRAFT AT APPROXIMATELY 8500 FEET MEAN SEA LEVEL (MSL). THE AIRCRAFT RETURNED TO CHEYENNE AIRPORT AND MADE AN UNEVENTFUL LANDING. THERE WERE NO INJURIES TO THE FOUR OCCUPANTS ON BOARD. WEATHER AT THE TIME WAS VISUAL METEOROLOGICAL CONDITIONS (VMC).
NTSB investigation
The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.