Seattle - The recent crashes of two brand new Boeing 737 MAX 8 caused uncertainty and dismay worldwide. If two almost new aircraft of the same type crash at short intervals just after takeoff at a comparable flight altitude, alarm bells ring.
We are only at the beginning of an investigation and we have to be very careful about what we have. We are strongly loyal to our "respect" principle, while speculating about the possible causes of the recent fatal Boeing 737 MAX 8 crashes in just a few months.
But in the current state, there are several common elements with the accident on October 29, 2018, of the Lion Air's flight 610, which crashed into the Java Sea after a few minutes from the takeoff.
First, both aircraft are of the same type and they are almost new. In both cases, the pilots reported problems with the airspeed and asked to turn back. This is most likely a technical problem.
The similarities between the two accidents bring to mind the possibility of a flight control software problem or a design problem or both.
The engines of the 737 MAX 8 jets are bigger than its predecessor Boeing 737-800 and the Boeing's new jet behaves quite differently than the 737-800.
The current MAX 8 has a modified software that manages the electrical flight controls. This modification was made with a patch.
During the certification process of the aircraft, Boeing spotted the instability problem at low speeds and corrected it with a patch to the flight control software. But if there is a problem in design, the software updates wouldn't solve the problem completely.
Below there is an illustration about the possible cause of the recent Boeing 737 MAX 8 crashes.
The data retrieved from the FDR (Flight Data Recorder) and the evaluation of the similarities between two accidents will most likely reveal the root cause of the problem.