Incident Overview
Date: Sunday 22 June 1986
Aircraft Type: de Havilland Canada DHC-6 Twin Otter 300
Owner/operator: Ethiopian Airlines
Registration Number: ET-AIQ
Location: near Dembidollo –
ÿ Ethiopia
Phase of Flight: Approach
Status: Destroyed, written off
Casualties: Fatalities: 0 / Occupants: 20
Component Affected: Aircraft Control Surfaces (especially flaps)Aircraft Control Surfaces (especially flaps)
Category: Accident
A Twin Otter aircraft experienced a catastrophic loss of control during flight over rising terrain obscured by low stratus clouds. Applying maximum climb power with 10 degrees flaps resulted in a stall and continued stalling even with 20 degrees of flaps, leading to a collision with trees and subsequent crash.A Twin Otter aircraft experienced a catastrophic loss of control during flight over rising terrain obscured by low stratus clouds. Applying maximum climb power with 10 degrees flaps resulted in a stall and continued stalling even with 20 degrees of flaps, leading to a collision with trees and subsequent crash.
Description
The Twin Otter encountered rising terrain, covered by low stratus clouds. In an attempt to clear the rising terrain, maximum climb power was applied, with 10 degree flaps. The aircraft began to stall and continued to stall even when 20 degrees of flaps were selected. The Twin Otter struck trees and crashed.
Primary Cause
Excessive climb power combined with insufficient airspeed and control during challenging terrain conditions.Excessive climb power combined with insufficient airspeed and control during challenging terrain conditions.Share on:
