Part 4/9:
As the pilots grappled with the disappearing data from their altimeters, they also started to receive contradictory warnings from various aircraft systems. The rudder ratio warning and the MAC trim warning signaled errors related to aircraft speed, further complicating their decision-making. With only flawed instruments to inform their actions, Schreiber directed Fernandez to maneuver the aircraft away from the mountainous terrain surrounding Lima, optimistic that there might still be a working altimeter.
In an environment already rife with stress due to equipment malfunction, the situation worsened. When air traffic control provided the pilots with their ground speed, they unknowingly placed their trust in data affected by the faulty sensors onboard.