Accident de Havilland Canada DHC-6 Twin Otter 300 HB-LOK,
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Date:Friday 19 November 2004
Type:Silhouette image of generic DHC6 model; specific model in this crash may look slightly different    
de Havilland Canada DHC-6 Twin Otter 300
Owner/operator:Zimex Aviation
Registration: HB-LOK
MSN: 658
Year of manufacture:1980
Total airframe hrs:20437 hours
Engine model:Pratt & Whitney Canada PT6A-27
Fatalities:Fatalities: 0 / Occupants: 4
Aircraft damage: Substantial, repaired
Location:Menzel Lejmat North -   Algeria
Phase: Landing
Departure airport:Menzel Lejmat North
Destination airport:Menzel Lejmat North
Confidence Rating: Accident investigation report completed and information captured
The Twin Otter departed the dirt runway of the Menzel Lejmat North oil field near Hassi Messaoud. This caused severe damage to wing and propeller.

CAUSE (translated from French):
By examining the flight manual, the Commission noted that among the instructions to follow, is checking the position of the nose wheel after a take-off as well as before landing.
If the wheel is not centered after takeoff, it can gradually drift up to its full limit deflection.
This verification must be done by centering the control lever until it gets stuck in a centered position and resistance is felt.
On the other hand, there is no relationship between the guidance system of the nose wheel and the rudder pedals.
There is therefore a high probability that the accident is due to the maneuver, voluntarily or not, of the nose wheel in the landing phase in which only the use of the rudder is permitted.
This operation resulted in the deflection and wheel locking, rendering the aircraft uncontrollable.


Scramble 308
Steven Vervaat


photo (c) anon; Menzel Lejmat North; November 2004

photo (c) Reinhard Schmidt, via Werner Fischdick; Zürich-Kloten Airport (ZRH/LSZH); June 1991

Revision history:


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