Originally Posted by
infrequentflyer789
Pretty sure cross FCC bus is already there, not absolutely sure AOA is on it, but if not, adding it would be a lot different to creating entirely new bus.
MCAS could have been done with two AOA sources in the first place, it wasn't (allegedly - see whistleblower quotes further up thread) because that would require an MCAS-fail warning light and sim-training. This now appears to be being done in a half-arsed way by using AOA-disagree as a de-facto MCAS-fail warning, which means operators who don't currently have AOA-disagree option will presumably need to implement extra training (or get blamed for future MCAS prangs) but the US operators with the no-sim-training penalty clauses will not because they already have the AOA disagree option. Funny that...
I thought I'd read that AoA-Disagree was going to be added by default as part of the fix(?).