Part 5/9:
Approaching Charles de Gaulle Airport, conditions indicated an overcast cloud layer with moderate visibility, appropriate for an Instrument Landing System (ILS) procedure. As they descended, the First Officer disconnected the autopilot to hand-fly the remaining approach, a decision which, while common, heightened the stakes considerably.
As they neared the runway, a minor and seemingly unnoticeable issue began to take shape: a slight bank angle shift to the right, perceived by the First Officer as a malfunction. Driven by his training and possibly his recent readings regarding potential system interference, he adjusted his control inputs to counteract what he believed was an aircraft anomaly, inadvertently initiating increased left bank.