Originally Posted by
mross
Why does a faulty AoA sensor trigger a 'Feel Diff Press'? It does not seem to be an informative message, especially when there is no hydraulic system failure.
And why does an aircraft have three pitots (so that one can be 'voted out') but only two alpha vanes?
The Feel computer has two channels and they independently regulate the two different HYD source pressures to do the job in this sytem. If there is a difference in he two channels metered HYD pressure above a set value (I think it is 25%, I cannot recollect), you get an 'Elev Feel Warning'. That is so in B747. So I will assume it is same in B737. A faulty AOA sensor can make the Elev Feel Computer malfunction also.
Hope that makes sense?