RAYTHEON AIRCRAFT COMPANY C90A
Bismarck, ND — July 23, 2009
Event Information
| Date | July 23, 2009 |
| Event Type | ACC |
| NTSB Number | CEN09CA470 |
| Event ID | 20090728X63439 |
| Location | Bismarck, ND |
| Country | USA |
| Coordinates | 46.77278, -100.74583 |
| Airport | Bismarck Municipal Airport |
| Highest Injury | NONE |
Aircraft
| Make | RAYTHEON AIRCRAFT COMPANY |
| Model | C90A |
| Category | AIR |
| FAR Part | 091 |
| Aircraft Damage | SUBS |
Conditions
| Light Condition | DAYL |
| Weather | VMC |
Injuries
| Fatal | 0 |
| Serious | 0 |
| Minor | 0 |
| None | 3 |
| Total Injured | 0 |
Probable Cause
The cabin entry door inadvertently opening during initial climb.
Full Narrative
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.
About This NTSB Record
This aviation event was investigated by the National Transportation Safety Board (NTSB). NTSB investigates all U.S. civil aviation accidents to determine probable cause and issue safety recommendations to prevent future accidents.