Incident Overview

Date: Wednesday 28 April 1976
Aircraft Type: de Havilland Canada DHC-4A Caribou
Owner/operator: Uganda Police Airwing
Registration Number: 5X-AAB
Location: Entebbe Airport (EBB) – ÿ Uganda
Phase of Flight: Landing
Status: Destroyed, written off
Casualties: Fatalities: 0 / Occupants: 2
Component Affected: Aircraft Engine (specifically the operative engine)Aircraft Engine (specifically the operative engine)
Category: Accident
A no. 2 engine failure occurred during a training flight, resulting in a significant impact with the runway. The student pilot feathered the propeller and continued the approach to a full stop landing. Upon touchdown, the gear was raised and engine power increased, leading to a roll and impact with the right wingtip and main gear leg. The aircraft skidded off the runway, causing damage to the drainage ditch and barbed wire fence.A no. 2 engine failure occurred during a training flight, resulting in a significant impact with the runway. The student pilot feathered the propeller and continued the approach to a full stop landing. Upon touchdown, the gear was raised and engine power increased, leading to a roll and impact with the right wingtip and main gear leg. The aircraft skidded off the runway, causing damage to the drainage ditch and barbed wire fence.

Description

During a training flight, a no. 2 engine failure was simulated. The student pilot feather the propeller and continued the approach for a full stop landing. On finals the gear was raised and engine power increased. The aircraft rolled to the right and impacted the runway with its right wingtip and right hand main gear leg. The Caribou skidded off the runway for some 220 m, crashed across a drainage ditch and through a barbed wire fence. PROBABLE CAUSE: “Strong asymmetric thrust caused by increasing engine power on the operative engine when the aircraft was about to touch down with one engine feathered. Contributing factors were: 1) the lack of understanding between the two flight crew members of what each other was doing immediately prior to the accident; 2) the student/instructor relationship between the two and the prevailing dark night-time conditions.”

Primary Cause

Strong asymmetric thrust caused by increasing engine power on the operative engine when the aircraft was about to touch down with one engine feathered.Strong asymmetric thrust caused by increasing engine power on the operative engine when the aircraft was about to touch down with one engine feathered.

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