Incident Overview
Date: Thursday 23 April 1959
Aircraft Type: Avro 688 Super Trader
Owner/operator: Air Charter Ltd.
Registration Number: G-AGRH
Location: Mount Sphan –
ÿ Trkiye
Phase of Flight: En route
Status: Destroyed, written off
Casualties: Fatalities: 12 / Occupants: 12
Component Affected: Aircraft Navigation SystemAircraft Navigation System
Category: Accident
A Super Trader aircraft crashed on Suphan Mountain after drifting north of its normal track due to strong winds, resulting in a loss of navigation and control. The incident was likely caused by a combination of factors including inaccurate wind forecasts, insufficient altitude checks, and inadequate coordination of flight and beacon calculations.A Super Trader aircraft crashed on Suphan Mountain after drifting north of its normal track due to strong winds, resulting in a loss of navigation and control. The incident was likely caused by a combination of factors including inaccurate wind forecasts, insufficient altitude checks, and inadequate coordination of flight and beacon calculations.
Description
The Super Trader departed Ankara for a flight to Bahrain. At 08:14 the aircraft passed Gemerek at FL115 and Elazig at 08:59 (at FL135). Last position report received was when over Mus at 09:26. The aircraft had crashed and was found after six days on Suphan Mountain. PROBABLE CAUSE: “The aircraft, flying on instruments, drifted north of its normal track because of strong winds and crashed into the mountain. Contributing factors’ 1) The winds were stronger than forecast; 2) An accurate bearing could not be obtained at Mus, and Van had not been checked; 3) Sub-normal temperatures would result in a high indicated altimeter reading; 4) Calculations on the flight and contacts with beacons were not coordinated and controlled.”
Primary Cause
Strong winds and inaccurate navigation leading to drift.Strong winds and inaccurate navigation leading to drift.Share on:
