Incident Overview
Date: Tuesday 18 August 1970
Aircraft Type: Tupolev Tu-124V
Owner/operator: CSA Ceskoslovensk Aerolinie
Registration Number: OK-TEB
Location: Zrich-Kloten Airport (ZRH) –
ÿ Switzerland
Phase of Flight: Landing
Status: Destroyed, written off
Casualties: Fatalities: 0 / Occupants: 20
Component Affected: Cabin Pressure Control SystemCabin Pressure Control System
Category: Accident
A flight from Prague to Zurich experienced a critical issue during descent. The cabin pressure control system malfunctioned, requiring manual intervention by the flight engineer. The captain ordered gear reduction, but the engineer failed to register the instruction, leading to the aircraft touching down on its belly at a reduced speed. An early activation of the aural gear warning system was a contributing factor.A flight from Prague to Zurich experienced a critical issue during descent. The cabin pressure control system malfunctioned, requiring manual intervention by the flight engineer. The captain ordered gear reduction, but the engineer failed to register the instruction, leading to the aircraft touching down on its belly at a reduced speed. An early activation of the aural gear warning system was a contributing factor.
Description
Flight OK744 departed Prague for a flight to Zurich. Problems with the cabin pressure during the descent forced the flight engineer to control the pressure manually. When approaching runway 16, the captain ordered the flight engineer to lower the gear, but the engineer didn’t hear it being preoccupied with the cabin pressure. The approach was continued and the Tupolev touched down on its belly, sliding for 875 m down the runway. The aural gear warning system had been turned off early in the approach.
Primary Cause
Cabin pressure control system malfunction.Cabin pressure control system malfunction.Share on:
