Daily Management Review

Second Round Of 737 Max Crash Probe Suggest MCSAS System Activation


Amid Boeing’s announcement to strengthen training and tech system, investigation team looks for establishing data to confirm their theory behind the crash.

Three people familiar with Boeing 737 Max jet flights’ crash reported that an “anti-stall system” which is at the probe’s centre was at play prior to last month’s crash on Ethiopia, even during the identical crash which took place five months ago in Indonesia.
The anti-stall MCAS system has a mechanism of pushing the jet’s nose downward, while data gathered from the recorder of “Ethiopian Airlines flight” revealed that the system was active before the “jet ploughed into a field outside Addis Ababa” on March 10, 2019. However, the speakers put up a condition for anonymity in the eve of “an interim official report”.
The data was first published by the Wall Street Journal, while the “Federal Aviation Administration” as well as Boeing Inc. refused to give any comment on it. During the “initial sample” data recovery followed by the crash of “Ethiopian flight 302”, evidences had pointed out “similar ‘angle of attack’”, while the second such evidence, as mentioned above, only corroborated the first reading from the crash.
At first Reuters came out with the initial readings recovered from the Ethiopian jet, which dealt with “stall-related information” in place as a requirement of triggering the “automated nose-down MCAS system”. The activation should kick in depending on the “angle of attack”, in other words “measuring the way the wing cuts through the air”. Now this mechanism has turned “too high to avoid the plane stalling or losing lift”.
Nevertheless, it still remains to be clarified if the Ethiopian jet system, responded “to faulty sensor data”, as it did during Indonesian crash, or was it “genuine stall indications”, while the authorities from the U.S., France and Ethiopia found “similarities between the two accidents”. These incidents had triggered the global “737 MAX” aircraft grounding which was only “recently “introduced”. However, Ethiopia is leading an investigation to find out if the anti-stall mechanism “overpowered the pilots” or not, such scenario has been observed in the “Lion Air crash”. Once the truth surfaces, the team will further investigate into the actions taken by the crew.
Suggestions coming from Boeing’s part included the usage of “two existing cut-out switches” which could have prevented the disaster occurred in the Lion Air crash. Nevertheless, Boeing has also made an announcement to “beef up the system and improve training”.
Two sources familiar with the matter think that the pilots manoeuvring the Ethiopian Airlines “did not hit the cut-out switches” due to the high speed of the airplane which could have resulted in fatal descent, although there still needs to be establishing data for confirming the same.