Maneuvering Characteristics Augmentation System

Automated flight control feature of the Boeing 737 MAX to adapt its flying characteristics to new engines and their mounting position on the wings.

Maneuvering Characteristics Augmentation System (Under CC License)

The Maneuvering Characteristics Augmentation System (MCAS) is a Boeing 737 MAX flight control system that attempts to mimic pitching behavior similar to the Boeing 737 NG, especially in low-speed and high angle of attack (AoA) flight. It adjusts horizontal stabilizer trim to bring the aircraft nose down when it asserts the aircraft is in imminent danger, based on input from airspeed, altitude and angle of attack sensors. However, it is susceptible to erroneous activation, as in the cases of Lion Air Flight 610 and Ethiopian Airlines Flight 302. The system has resulted worldwide groundings of the airliner, pending accident investigations, certification inquiry, and necessary changes to the MCAS software, cockpit instruments, and crew manuals and training.

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