N405DD

On July 23, 2009, a Raytheon Aircraft Company C90A (N405DD) was involved in an incident near Bismarck, ND. All 3 people aboard were uninjured. The aircraft sustained substantial damage.

The National Transportation Safety Board determined the probable cause of this incident to be: The cabin entry door inadvertently opening during initial climb.

The pilot had the copilot close the cabin entry door, which later came open while the airplane was climbing through 500 feet above ground level after takeoff. The pilot executed a return to the departure airport where the airplane was landed without further incident. The door remained attached at the hinge and about half of the door skin was pulled away resulting in substantial damage to the airplane pressure vessel. The pilot stated that the CABIN DOOR annunciator was never illuminated. The operator reported that all the door latches were in the extended positions after the accident.

This incident is documented in NTSB report CEN09CA470. AviatorDB cross-references NTSB investigation data with FAA registry records to provide comprehensive safety information for aircraft N405DD.