Nov. 27 (UPI) -- Information from the flight data recorder in the deadly crash of Lion Air Flight 610, released Tuesday, showed an anti-stall system was pushing the Boeing 737's nose down.
Data from the so-called black box recorder showed the new Boeing maneuvering characteristics augmentation system, or MCAS, repeatedly pushed the nose of the plane down, forcing the pilots to pull the nose back up more than a dozen times throughout the 11-minute flight, CBS News reported
The pilots' efforts were ultimately unsuccessful and the plane was left careening into the Java Sea at 450 mph, as all 189 people on board were killed.
Investigators believe the MCAS began malfunctioning because a sensor on the outside of the 737 was receiving incorrect readings. They also found it had reported incorrect readings on its three previous flights and the problem persisted even after the sensor was replaced.
Earlier this month, airline safety experts and pilots' groups said Boeing failed to disclose information about about MCAS.
Jon Weaks, president of the Southwest Airlines Pilots Association, said pilots and companies should have been informed of the automated stall-prevention system after pilot unions and other experts said they had no idea it was added to the new 737 model and were unaware of the potentially fatal consequences.
Boeing said the proper details for how to pull out of an incorrect activation of the system were already included in flight manuals and there was no need to the specific system in the new 737 jet.
The company reiterated that stance in a statement Tuesday, saying "the appropriate flight crew response to uncommanded trim, regardless of cause, is contained in existing procedures."
The flight's voice recorder has yet to be recovered and could eventually provide more insight into what happened in the cockpit during the crash.