Bangkok - Muang Khon Kaen

On March 30, 1993 at 12:00 AM, Bangkok - Muang Khon Kaen experienced a crash involving Boeing 737-300, operated by Royal Thai Air Force - Kong Thap Akat Thai, with the event recorded near Muang Khon Kaen Khon Kaen (<U+0E02><U+0E2D><U+0E19><U+0E41><U+0E01><U+0E48><U+0E19>).

The flight was categorized as test and the reported phase was landing (descent or approach) at a airport (less than 10 km from airport) crash site.

6 people were known to be on board, 6 fatalities were recorded, 0 survivors were identified or estimated. This corresponds to an estimated fatality rate of 100.0%.

Crew on board: 5, crew fatalities: 5, passengers on board: 1, passenger fatalities: 1, other fatalities: 0.

The listed crash cause is technical failure. During the days prior to the accident, various problems with the pitch-trim system and the horizontal stabilizers were noticed and reported. Repairs were conducted by technicians from the Royal Thai Air Force but apparently, not according to the Boeing published procedures, so a Boeing engineer was dispatched in Thailand to proceed to controls and tests. On approach to Muang Khon Kaen Airport, the aircraft started to pitch up and down then stalled. The crew increased engine power and regained control for few seconds when the aircraft stalled a second time few seconds later. The crew elected to regain control and to reduce the rate of descent when the aircraft entered an uncontrolled descent and crashed in a rice paddy field located few km from the airport. The aircraft was destroyed and all six occupants were killed. The aircraft has the dual registration 33-333 (military) and HS-TGQ (civil).

Aircraft reference details include registration 33-333, MSN 24480, year of manufacture 1989.