Incident Overview

Date: Wednesday 9 July 1969
Aircraft Type: Sud Aviation SE-210 Caravelle III
Owner/operator: Thai Airways International
Registration Number: HS-TGK
Location: Bangkok International Airport (BKK) – ÿ Thailand
Phase of Flight: Landing
Status: Destroyed, written off
Casualties: Fatalities: 0 / Occupants: 75
Component Affected: Approach equipment (ILS)Approach equipment (ILS)
Category: Accident
During heavy rain and thunderstorms, the Caravelle approached Bangkok, experiencing ILS equipment failure. The approach was continued using the VOR, but the aircraft was slightly high and left of the centreline. The first officer reduced the speed to 122 knots, but the speed continued to decrease, resulting in a significant sinkrate. The pilot took over control, leading to a heavy landing with the main gear penetrating the wings due to downdrafts. Downdrafts were present in the area.During heavy rain and thunderstorms, the Caravelle approached Bangkok, experiencing ILS equipment failure. The approach was continued using the VOR, but the aircraft was slightly high and left of the centreline. The first officer reduced the speed to 122 knots, but the speed continued to decrease, resulting in a significant sinkrate. The pilot took over control, leading to a heavy landing with the main gear penetrating the wings due to downdrafts. Downdrafts were present in the area.

Description

The Caravelle approached Bangkok in heavy rain and thunderstorms when the ILS equipment failed. The approach was continued by reference to the VOR. The runway was sighted at 700 feet altitude, but the aircraft was slightly high and left of the centreline. At 300 feet, with an airspeed of 127 knots (planned approach speed being 122 kts) the aircraft was still a little high. The first officer, who was flying the approach, reduced the speed to 122 knots, but the speed continued to decrease and the sinkrate increased. The pilot took over control, but the Caravelle made a very heavy landing, forcing the main gear through the wings. Downdrafts were present in the area.

Source of Information

https://www.baaa-acro.com/operator/thai-airways-international?page=6https://www.baaa-acro.com/operator/thai-airways-international?page=6

Primary Cause

ILS equipment failure during an approach.ILS equipment failure during an approach.

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