ASN Aircraft accident Boeing 737-4D7 HS-TDC Bangkok International Airport (BKK)
ASN logo

Status:Accident investigation report completed and information captured
Date:Saturday 3 March 2001
Type:Silhouette image of generic B734 model; specific model in this crash may look slightly different
Boeing 737-4D7
Operator:Thai Airways International
Registration: HS-TDC
MSN: 25321/2113
First flight: 1991-08-22 (9 years 7 months)
Total airframe hrs:21006
Engines: 2 CFMI CFM56-3C1
Crew:Fatalities: 1 / Occupants: 8
Passengers:Fatalities: 0 / Occupants: 0
Total:Fatalities: 1 / Occupants: 8
Aircraft damage: Damaged beyond repair
Location:Bangkok International Airport (BKK) (   Thailand)
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
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:

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."

Fuel tank explosion
Damaged on the ground



photo of Boeing-737-4D7-HS-TDC
accident date: 03-03-2001
type: Boeing 737-4D7
registration: HS-TDC
photo of Boeing-737-4D7-HS-TDC
accident date: 03-03-2001
type: Boeing 737-4D7
registration: HS-TDC
photo of Boeing-737-4D7-HS-TDC
accident date: 03-03-2001
type: Boeing 737-4D7
registration: HS-TDC

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).
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.
languages: languages


Boeing 737-400

  • 486 built
  • 5th loss
  • 5th fatal accident
  • 5th worst accident (at the time)
  • 7th worst accident (currently)
» safety profile

  • 34th worst accident (at the time)
  • 37th worst accident (currently)
» safety profile

The Aviation Safety Network is an exclusive service provided by:
Quick Links:

CONNECT WITH US: FSF on social media FSF Facebook FSF Twitter FSF Youtube FSF LinkedIn FSF Instagram

©2024 Flight Safety Foundation

1920 Ballenger Av, 4th Fl.
Alexandria, Virginia 22314