Accident description
Last updated: 19 April 2014
Status:Final
Date:Saturday 3 March 2001
Time:14:48
Type:Boeing 737-4D7
Operator:Thai Airways International
Registration: HS-TDC
C/n / msn: 25321/2113
First flight: 1991-08-22 (9 years 7 months)
Engines: 2 CFMI CFM56-3C1
Crew:Fatalities: 1 / Occupants: 8
Passengers:Fatalities: 0 / Occupants: 0
Total:Fatalities: 1 / Occupants: 8
Airplane damage: Damaged beyond repair
Location:Bangkok International Airport (BKK) (   Thailand) show on map
Phase: Standing (STD)
Nature:Domestic Scheduled Passenger
Departure airport:Bangkok-Don Muang International Airport (BKK/VTBD), Thailand
Destination airport:Chiang Mai International Airport (CNX/VTCC), Thailand
Flightnumber: 114
Narrative:
Boeing 737-400 "Narathiwat" was parked at gate 62 at the domestic terminal of Bangkok Airport and was being prepared by 5 cabin crew members and 3 ground staff members for a flight to Chiang Mai (TG 114). Ground temperatures were in the high 35 degree Celsius and the air conditioning packs, which are located directly beneath the center wing tank and generate heat when they are operating, had been running continuously since the airplane's previous flight, including about 40 minutes on the ground. At 14:48, some 27 minutes before scheduled departure time, fuel vapours in the center wing tank probably ignited, causing an explosion. A fire erupted in the cabin, killing a flight attendant and injuring 6 others. Eighteen minutes later, the fire caused the right wing tank to explode. The fire was put out in an hour, but by then the aircraft had been gutted by the fire.

PROBABLE CAUSE: "An explosion of the center wing tank resulting from ignition of the flammable fuel/air mixture in the tank. The source of the ignition energy for the explosion could not be determined with certainty, but the most likely source was an explosion originating at the center wing tank pump as a result of running the pump in the presence of metal shavings and a fuel/air mixture."

Events:


Sources:
» NTSB


Photos

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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 Chiang Mai International Airport as the crow flies is 564 km (353 miles).

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Boeing 737-400

  • 5th loss
  • 486 built
  • 5th worst accident (at the time)
  • 7th worst accident (currently)
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 Thailand
  • 34th worst accident (at the time)
  • 36th worst accident (currently)
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