Boeing is also working with the US Federal Aviation Administration (FAA) to schedule its certification test flight. Engadget reports that the FAA tentatively approved the updates in March, but it will have to test the updates before it can be certified.

As previously reported, the anti-stall systems of the Boeing 737 Max aircraft did not compare data from both on-board attack-of-angle (AOA) sensors. This causes the planes to inaccurately detect a stall, which then caused them to dive unnecessarily, leading to the two fatal crashes. Part of the update makes the anti-stall system take readings from both AOA sensors. Boeing did not specify how long exactly the certification and testing would last. The company did say that it is making progress in making the 737 Max with the updated anti-stall system one of the safest planes to fly. (Source: Boeing via Engadget)