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Last updated: 3 December 2021
Statuts:Enquête Officielle
Date:mardi 19 janvier 2010
Heure:07:15
Type/Sous-type:Silhouette image of generic BE20 model; specific model in this crash may look slightly different
Beechcraft B200 Super King Air
Compagnie:Blue Cross and Blue Shield of Iowa - BCBS
Immatriculation: N586BC
Numéro de série: BB-1223
Année de Fabrication: 1985
Heures de vol:10304
Moteurs: 2 Pratt & Whitney Canada PT6A-42
Equipage:victimes: 0 / à bord: 2
Passagers:victimes: 0 / à bord: 2
Total:victimes: 0 / à bord: 4
Dégats de l'appareil: Substantiels
Conséquences: Written off (damaged beyond repair)
Lieu de l'accident:Sioux Gateway Airport, IA (SUX) (   Etats-Unis d'Amérique)
Phase de vol: A l'atterrissage (LDG)
Nature:Affaires
Aéroport de départ:Des Moines Airport, IA (DSM/KDSM), Etats-Unis d'Amérique
Aéroport de destination:Sioux Gateway Airport, IA (SUX/KSUX), Etats-Unis d'Amérique
Détails:
A Beechcraft B200, N586BC, received substantial damage on impact with terrain during landing on runway 31 at Sioux Gateway Airport/Col. Bud Day Field (SUX), Iowa. Instrument meteorological conditions prevailed at the time of the accident. The pilot, copilot, and two passengers were uninjured.

The pilot filed an instrument-flight-rules (IFR) flight plan with the destination and alternate airports, both of which were below weather minimums. The pilot and copilot departed from Des Moines Airport in weather minimums that were below the approach minimums for the departure airport. While en route, the destination airport's automated observing system continued to report weather below approach minimums, but the flight crew continued the flight. The flight crew then requested and were cleared for the instrument landing system (ILS) 31 approach and while on that approach were issued visibilities of 1,800 feet runway visual range after changing to tower frequency. During landing, the copilot told the pilot that he was not lined up with the runway. The pilot reportedly said, "those are edge lights," and then realized that he was not properly lined up with the runway. The airplane then touched down beyond a normal touchdown point, about 2,800 feet down the runway, and off the left side of the runway surface. The airplane veered to the left, collapsing the nose landing gear.

The company's procedures did not allow flight crew to depart to an airport that was below minimums but did allow for the flight crew, at their discretion, to perform a "look-see" approach to approach minimums if the weather was below minimums. The allowance of a "look see" approach essentially negates the procedural risk mitigation afforded by requiring approaches to be conducted only when weather was above approach minimums.

Probable Cause:

PROBABLE CAUSE: "The flight crew's decision to attempt a flight that was below takeoff, landing, and alternate airport weather minimums, which led to a touchdown off the runway surface by the pilot-in-command."

Accident investigation:
cover
Investigating agency: NTSB
Status: Investigation completed
Duration: 275 days (9 months)
Accident number: CEN10LA105
Download report: Summary report


Photos

photo of Beechcraft-B200-Super-King-Air-N586BC
accident date: 19-01-2010
type: Beechcraft B200 Super King Air
registration: N586BC
photo of Beechcraft-B200-Super-King-Air-N586BC
accident date: 19-01-2010
type: Beechcraft B200 Super King Air
registration: N586BC
photo of Beechcraft-B200-Super-King-Air-N586BC
accident date: 19-01-2010
type: Beechcraft B200 Super King Air
registration: N586BC
photo of Beechcraft-B200-Super-King-Air-N586BC
accident date: 19-01-2010
type: Beechcraft B200 Super King Air
registration: N586BC
 

Plan
Ce plan montre l'aéroport de départ ainsi que la supposée destination du vol. La ligne fixe reliant les deux aéroports n'est pas le plan de vol exact.
La distance entre Des Moines Airport, IA et Sioux Gateway Airport, IA est de 243 km (152 miles).
Accident location: Approximate; accuracy within a few kilometers.

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 tel qu'ils sont connus à ce jour.
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