[x] Do not allow stop brake release while ECAS level adjustment is in progress.
[x] Make the red stop brake override ("NOT AUS") switch toggle-able. Only acknowledge an override request when both that switch and the throttle pedal are pushed at the same time. Additionally, do not acknowledge override when the manual stop brake engagement ("20-h") switch is active.
[x] When electrics are off/unavailable, release stop brake without throttling, unless manual stop brake engagement switch active.
[x] Do not display the VDV stop brake override warning based on the override switch, as is currently the case, but based on any of the usual stop brake release clearance preconditions (doors, kneeling, etc.) being violated.