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NTSB Report
July 23, 2009 · Raytheon Aircraft C90A · N405DD
Bismarck, ND
Overview
Report Status
Final with probable cause
Event Type
Accident
Date
July 23, 2009
Injury Outcomes
No injuries (3 uninjured)
Location
Bismarck, ND
Aircraft
Raytheon Aircraft C90A
Tail Number
N405DD
Operator
Und Aerospace Foundation
Injuries
None
Aircraft Damage
Substantial
NTSB Number
CEN09CA470
The pilot had the copilot close the cabin entry door, which later came open while the airplane climbed 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 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.
NTSB Probable Cause
Aircraft-Aircraft structures-Doors-Passenger/crew doors-Unintentional use/operation - C
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.
Flight
Event TypeAccident
Event Time12:30 CDT
Nearest AirportBismarck Municipal Airport (1nm)
Runway31
Runway Length8794 ft
Runway Width150 ft
Flight Plan FiledIFR
Flight Plan ActivatedYes
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftRaytheon Aircraft C90A
Tail NumberN405DD
Aircraft CategoryAir
DamageSubstantial
OperatorUnd Aerospace Foundation
Operating RulePart 91
Engines2
Engine TypeTurboprop
Engine DetailsPratt & Whitney · PT6A-21 · Turboprop · 550
Seats8
People & Injuries
Injury SummaryNo injuries (3 uninjured)
Fatal0
Serious0
Minor0
Uninjured3
Total3
Crew 1Age 29 · First Class · None
Crew 2Age 24 · First Class · Minor
Conditions
ConditionsVMC
LightDaylight
WindCalm
CeilingNone
Temperature / Dew Point0 C / 0 C
Altimeter0
Observation Time16:52
Weather SourceWFAC