Originally Posted by
Zeffy
(quoted)
The first officer failed to follow a procedure to identify which of the two sides of the aircraft was showing the correct airspeed. If he had, a checklist would have told him he could turn on the autopilot, ...
So we've come full circle, from "if the plane is playing up fly it manually" to "if the plane is playing up engage the autopilot"
...which would have stopped the nose-down movements of the errant flight control system.
Did the Lion Air crew know this? Specifically, did Boeing tell them?