Originally Posted by
Lyman
AZR
Hi. I recall from the "Another 447 avoided" that overspeed warning is primary over STALL warn...
Hi Lyman.
I'm sorry, you recall wrong here.
High AoA (Stall) protection has priority over other protections (IIRC, I stand to be corrected and hope I will not on that topic).
Stall warning has priority over other warnings.
Why? Because stall was deemed more dangerous.
Originally Posted by
HazelNuts39
In this case they don't have to freeze at the same time, but they have to freeze in the same manner. If a pitot is blocked at the intake and at the drains simultaneously, you wouldn't notice anything until you change altitude.
Hi HN39.
AFAIK, they have to freeze at the same time
and in the same manner if to fool failure detection mechanisms (comparing in real time values from 3 probes).
My point was: such an event in real conditions is extremely unlikely, that's why detection are based on that assumption. Don't you agree?