Boeing B747 Loss Of Control During Landing

The initial cause of the accident was the incomplete reduction of thrust on the left outer engine at the beginning of deceleration. This caused the de-activation of the automatic braking systems and the non-extension of the n° 1 thrust reverser. The inadvertent selection of full thrust on this engine after the landing created high thrust asymmetry leading to the runway excursion. The lack of co-ordination and of joint control by the crew members, perhaps aggravated by the presence of third parties in the cockpit, contributed to the development of this situation.

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