What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
During a descent after dropping parachute jumpers the passenger door opened in flight. As the pilot was attempting to secure it, the window opened, detached, and caught the horizontal stabilizer. The pilot diverted to his maintenance base at Warrenton. It was determined that metal fatigue caused the part to detach. The window is not designed to be opened in flight due it being subjected to extreme forces acting on an already fragile hinge.
As the FAA filed it
DURING A DESCENT AFTER DROPPING PARACHUTE JUMPERS THE PASSENGER DOOR OPENED IN FLIGHT. AS THE PILOT WAS ATTEMPTING TO SECURE IT, THE WINDOW OPENED, DETACHED, AND CAUGHT THE HORIZONTAL STABILIZER. THE PILOT DIVERTED TO HIS MAINTENANCE BASE AT WARRENTON. IT WAS DETERMINED THAT METAL FATIGUE CAUSED THE PART TO DETACH. THE WINDOW IS NOT DESIGNED TO BE OPENED IN FLIGHT DUE IT BEING SUBJECTED TO EXTREME FORCES ACTING ON AN ALREADY FRAGILE HINGE.
NTSB investigation
The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.
Other reports on N6324B · 1
Matched to the same aircraft by N-number and date.