Détails:An amphibious float-equipped de Havilland Canada DHC-3T Texas Turbine Otter, registered N455A, sustained substantial damage when it impacted mountainous tree-covered terrain, about 10 miles northeast of Aleknagik, Alaska. Of the nine people aboard, the airline transport pilot and four passengers died at the scene, and four passengers sustained serious injuries.
|Date:||lundi 9 août 2010|
|Type/Sous-type:||de Havilland Canada DHC-3T Texas Turbine Otter|
|Compagnie:||GCI Communication Corp.|
|Numéro de série:|| 206|
|Année de Fabrication:|| 1957|
|Moteurs:|| 1 Honeywell
|Equipage:||victimes: 1 / à bord: 1|
|Passagers:||victimes: 4 / à bord: 8|
|Total:||victimes: 5 / à bord: 9 |
|Dégats de l'appareil:|| Détruit|
|Conséquences:|| Written off (damaged beyond repair)|
|Lieu de l'accident:||16 km (10 milles) NW of Aleknagik, AK (Etats-Unis d'Amérique)
|Phase de vol:|| En vol (ENR)|
|Aéroport de départ:||Lake Nerka-GCI Lodge, AK, Etats-Unis d'Amérique|
|Aéroport de destination:||Nushagak River-sport fishing camp, AK, Etats-Unis d'Amérique|
One of the passengers killed in the crash was Ted Stevens (86), a former longtime Republican senator. Former NASA administrator Sean O'Keefe was also on board but survived the crash.
At the time of the accident, marginal visual meteorological conditions were reported at the Dillingham Airport, about 18 miles south of the accident site. The weather conditions at the accident site at that time are not known; however, searchers encountered instrument meteorological conditions (IMC) when they arrived at the accident site almost 6 hours later. The flight originated from a GCI-owned remote fishing lodge on the southwest shoreline of Lake Nerka, about 14:30 ADT. The flight was en route to a remote sport fishing camp on the banks of the Nushagak River, about 52 miles southeast of the GCI lodge. No flight plan was filed.
About 18:15 ADT, GCI's lodge manager contacted personnel at the sports fishing camp to inquire about the airplane's proposed return time. The fishing camp personnel told the GCI lodge manager that the airplane had not arrived, and that they assumed that the pilot had chosen a different fishing destination. The GCI lodge manager then initiated a phone and radio search to see if the airplane had diverted to Dillingham, Alaska or if it was en route back to the GCI lodge. Unable to locate the airplane, GCI lodge personnel initiated an aerial search along the pilot's anticipated route. Additional search airplanes and helicopters in the area voluntarily joined the search for the missing airplane. The airplane was officially reported overdue to the Federal Aviation Administration at 18:59 ADT.
About 20:05 ADT, volunteer airborne search personnel located the wreckage along the anticipated flight route, about 900 feet above mean sea level in the Muklung Hills, in steep, heavily wooded terrain, about 19 miles southeast of the GCI lodge.
The closest weather reporting facility was the Dillingham Airport, about 18 miles south of the accident site. At 14:55 ADT, about 10 minutes after the presumed time of the accident, the Dillingham weather observation reported, in part: wind, 180° (true) at 12 knots, gusting to 23 knots; visibility, 3 statute miles with light rain and mist; clouds and sky condition, 600 feet scattered, 1,000 feet overcast; temperature, 52° Fahrenheit (F); dew point, 48° F; altimeter, 29.58 inches of Mercury.
No emergency locator transmitter (ELT) signal was detected during the aerial search. Examination of the wreckage revealed that the ELT had separated from its mounting bracket during impact, and the antenna cable was found separated from the ELT.
PROBABLE CAUSE: "The National Transportation Safety Board determines that the probable cause of this accident was the pilot's temporary unresponsiveness for reasons that could not be established from the available information. Contributing to the investigation's inability to determine exactly what occurred in the final minutes of the flight was the lack of a cockpit recorder system with the ability to capture audio, images, and parametric data."
» NTSB Accident Docket
» Alaska State Troopers
Opérations de secours
Ce plan montre l'aéroport de départ ainsi que la supposé destination du vol. La ligne fixe reliant les deux aéroports n'est pas le plan de vol exact.
La distance entre Lake Nerka-GCI Lodge, AK et Nushagak River-sport fishing camp, AK est de 70 km (44 miles).
Les informations ci-dessus ne représentent pas l'opinion de la 'Flight Safety Foundation' ou de 'Aviation Safety Network' sur les causes de l'accident. Ces informations prélimimaires sont basées sur les faits tels qui sont connus à ce jour.