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Last updated: 14 December 2018
Status:Schlussbericht
Datum:Mittwoch 21 November 1990
Zeit:18:15
Flugzeugtyp:Silhouette image of generic DH8A model; specific model in this crash may look slightly different
de Havilland Canada DHC-8-103
Fluggesellschaft:Bangkok Airways
Kennzeichen: HS-SKI
Werknummer: 172
Baujahr: 1989
Betriebsstunden:3416
Anzahl Zyklen der Zelle:2998
Triebwerk: 2 Pratt & Whitney Canada PW120A
Besatzung:Todesopfer: 5 / Insassen: 5
Fluggäste:Todesopfer: 33 / Insassen: 33
Gesamt:Todesopfer: 38 / Insassen: 38
Sachschaden: Zerstört
Konsequenzen: Written off (damaged beyond repair)
Unfallort:5 km (3.1 Meilen) SW of Koh Samui Airport (USM) (   Thailand)
Flugphase: Annäherung (APR)
Betriebsart:Inländischer planmäßiger Passagierflug
Flug von:Bangkok-Don Muang International Airport (BKK/VTBD), Thailand
Flug nach:Koh Samui Airport (USM/VTSM), Thailand
Flugnummer: 125
Unfallbericht:
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."

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


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photo of de Havilland Canada DHC-8-103 HS-SKI
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Map
This map shows the airport of departure and the intended destination of the flight. The line between the airports does not display the exact flight path.
Distance from Bangkok-Don Muang International Airport to Koh Samui Airport as the crow flies is 486 km (304 miles).
Accident location: Approximate; accuracy within a few kilometers.

This information is not presented as the Flight Safety Foundation or the Aviation Safety Network’s opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.
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