Originally Posted by
Water pilot
Not particularly remote since it was the left side that the shaker was active on. We don't really know how the thumb switches operate, at first I thought that they were just switches to a solenoid but it seems more likely that they are just inputs to the fancy two computer/four processor 'black box' that is part of the flight control system. At that point, anything is possible since it is software.
I am not a pilot, but it happens I can understand electrical schematics, the stab one is messy, clearly has been patched and subject to additions over the years with a mix of relays logic, analog and digital. The thumb switches are inputs to a fancy block, but they are hardware interlocked by column swtiches, cutout, etc. MCAS does not even compute the cutout switches...i do not believe the SW has any major control on thumb switches, Imcannot post the circuit from mobile, but,was posted earlier on this thread