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Boeing B777 Loss of Control on Approach

During the ILS approach to runway 26L, without external visual references, in manual flight, the PF expressed his surprise about the airplane’s bank angle and flew a missed approach. At this time, the airplane was within 0.2 dots left of the localizer with a bank angle of 6°. The two pilots then simultaneously made inputs on the controls for 53 s. The pitch controls were desynchronized for 12 s due to opposing forces. Two brief episodes of roll control desynchronization were also observed. After recovering control of the flight path, the crew carried out a new approach to runway 27R without further incident.

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