Originally Posted by
PEI_3721
Later supposition is reasonable based on the systems descriptions and MCAS logic. With the trim issue apparently under control, but still cycling, the focus of fault finding may have reverted to stick shake and low speed awareness - UAS (was that written up in previous tech-log entries). This may have involved change of control and concluding a misidentified stall (cf reversed AF 447 mentality) thus thrust addition, allowing the nose to lower and speed increase, before the trim, stick force, increasing airspeed prevented recovery.
This crew wasn’t doing UAS, that’s clear from the data.
But change of control is certainly one hypothetical, which could explain the sudden plunge after maintaining control for several minutes... eg one pilot says “handing over, I need to find the circuit breaker for this stick shaker....” - if so it would sound disturbingly like the Air Asia Indonesia fatality.