Originally Posted by
ST Dog
That's not what started this subthread.
The point was AoA indicator is not needed. That's why it was an option. It's not required by the FAA/EASA/etc.
You fly attitude and power not AoA.
It was also not my intention to imply "the pilots should/could have just flown attitude and thrust" . Rather I was trying to have a discussion around the need for there to be an understanding that the automation can (and did in this and other situations) loose situational awareness , in such case it should not be raising any situational alarms or (as in this case) taking any action. In this case the FMC did know it was foo-bar but did not have a programmed response of shutting down all situational processes and alarms to a fail safe state. It could and should have!