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Last updated: 29 September 2020
Statuts:Enquête Officielle
Date:mercredi 21 novembre 1990
Heure:18:15
Type/Sous-type:Silhouette image of generic DH8A model; specific model in this crash may look slightly different
de Havilland Canada DHC-8-103
Compagnie:Bangkok Airways
Immatriculation: HS-SKI
Numéro de série: 172
Année de Fabrication: 1989
Heures de vol:3416
Cycles:2998
Moteurs: 2 Pratt & Whitney Canada PW120A
Equipage:victimes: 5 / à bord: 5
Passagers:victimes: 33 / à bord: 33
Total:victimes: 38 / à bord: 38
Dégats de l'appareil: Perte Totale
Conséquences: Written off (damaged beyond repair)
Lieu de l'accident:5 km (3.1 milles) SW of Koh Samui Airport (USM) (   Thaïlande)
Phase de vol: En approche (APR)
Nature:Transport de Passagers Nat.
Aéroport de départ:Bangkok-Don Muang International Airport (BKK/VTBD), Thaïlande
Aéroport de destination:Koh Samui Airport (USM/VTSM), Thaïlande
Numéro de vol: 125
Détails:
Flight 125 left Bangkok at 09:58 UTC with IFR clearance to Samui at FL210. Samui Tower was contacted at 10:45 and the crew were told runway 17 was the active runway and that the weather was fair with rain southwest of the field. Wind was later reported at 030 deg/10 knots and the runway was changed to runway 35. On base leg for runway 35 the flight continued ahead instead of turning right for finals. A missed approach procedure was executed with flaps still fully extended and both pilots were confused about which way to go. Samui Tower instructed them to turn left because of a mountain on the right side. BKP 125 entered an area of heavy rain and rolled to the left. Both pilots were disoriented as the aircraft continued to descend in a left wing down attitude. The aircraft eventually impacted into a coconut plantation at a 147 knots speed, 36deg nose-down and 75deg left roll.

Probable Cause:

PROBABLE CAUSE: "The pilot experienced spatial disorientation which resulted in improper control of the aircraft. Factors which contributed to accident were as follows: (1) The pilot flew the aircraft into bad weather condition which had very little or no visual reference; (2) Channelized attention occurred when all of the pilots concentration were focused on looking for the airport and neglecting to do proper cross checking or monitoring the aircraft attitude; (3) Confusion of pilots, poor teamwork or poor cockpit co-ordination in monitoring the flight instruments might contribute to loss of situational awareness and improper control of the aircraft through their false senses."

Sources:
» ICAO Circular 263-AN/157 (231-245)


Photos

photo of DHC-8-103-HS-SKI
accident date: 21-11-1990
type: de Havilland Canada DHC-8-103
registration: HS-SKI
 

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 Bangkok-Don Muang International Airport et Koh Samui Airport est de 486 km (304 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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