Incident Overview

Date: Thursday 20 November 1975
Aircraft Type: Antonov An-24B
Owner/operator: Aeroflot / Belarus
Registration Number: CCCP-46349
Location: 17 km W of Kharkov Airport (HRK) – ÿ Ukraine
Phase of Flight: Approach
Status: Destroyed, written off
Casualties: Fatalities: 19 / Occupants: 50
Component Affected: Flight Control System (specifically, the Airspeed Indicator – ASI)Flight Control System (specifically, the Airspeed Indicator – ASI)
Category: Accident
Narrative
A An-24 passenger plane, CCCP-46349, experienced a catastrophic crash near Kharkov Airport due to a CFIT accident. The aircraft lost all crew members and eighteen passengers, resulting in fatalities. Incorrect air traffic control settings, specifically a wrong QNH setting, led to erroneous altimeter readings, which were subsequently misinterpreted as a descent. The pilot disregarded a ground proximity warning system while approaching the area in clouds, resulting in a crash into a hillside.A An-24 passenger plane, CCCP-46349, experienced a catastrophic crash near Kharkov Airport due to a CFIT accident. The aircraft lost all crew members and eighteen passengers, resulting in fatalities. Incorrect air traffic control settings, specifically a wrong QNH setting, led to erroneous altimeter readings, which were subsequently misinterpreted as a descent. The pilot disregarded a ground proximity warning system while approaching the area in clouds, resulting in a crash into a hillside.

Description

The An-24 passenger plane, CCCP-46349, was damaged beyond repair in a controlled flight into terrain (CFIT) accident near Kharkov Airport (HRK). One crew member and eighteen passengers were killed; three crew members and 28 passengers survived the accident. Air traffic control reported a wrong QNH setting to the crew. The altimeter was thus programmed with incorrect parameters, causing false altitude indications. The readings of the barometric altimeter differed from the real altitude by 220 metres. On approach to Kharkov in clouds the crew ignored the warning of the ground proximity warning system and continued their descent until the aircraft hit trees, crashing into the slope of a hill. The aircraft operated on a flight from Mineralnyye Vody to Gomel via Rostov and Kharkov.

Source of Information

https://www.airhistory.net/info/soviet.php, http://airdisaster.ru/database.php?id=115https://www.airhistory.net/info/soviet.php, http://airdisaster.ru/database.php?id=115

Primary Cause

Incorrect QNH setting on the flight control system.Incorrect QNH setting on the flight control system.

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