The Lion Air flight JT-610 crash in 2018, which killed all 189 people on board, is suspected to have been caused by a combination of factors, including a faulty angle of attack (AOA) sensor and, critically, errors made by the co-pilot. The co-pilot, despite being a qualified pilot, was deemed to have shown a lack of situational awareness and poor crew resource management during the emergency.
Specifically, data suggests the co-pilot failed to properly respond to the activation of the Maneuvering Characteristics Augmentation System (MCAS), a safety feature designed to prevent stalls. MCAS, triggered by the faulty AOA sensor, repeatedly forced the aircraft’s nose down. The co-pilot, who was flying the plane at the time, did not execute the correct procedure to disable the system and regain control.
The investigation revealed a pattern of similar AOA sensor malfunctions on previous flights of the same aircraft. However, the crew of those earlier flights managed to overcome the issues. The crucial difference in the fatal flight was the co-pilot’s inability to recognize and correct the MCAS activation, ultimately leading to the plane’s crash into the Java Sea. The investigation also pointed to potential shortcomings in Lion Air’s pilot training and maintenance procedures.
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