Originally Posted by
Concours77
The AoA is the instrument responsible for StallWarn, right? Wouldn't the AoA vane have been pinned at way past critical, AlphaMax the entire descent, regardless IAS? This story about "StallWarn inop below 60 knots" sounds like a red herring....the rate of descent was astronomical...my point at Impact: linking airspeed to StallWarn, not AoA vane operation (except when both are legitimately affected with low velocity,......etc.... ) ???
thanks!
Standing by to be corrected if I’m wrong…
The AoA generates the stall warning, but there must be some lower limit below which it will be considered invalid, otherwise you could be sitting at the gate with the stall warning going off, for example.
The engineers made a decision to disregard the stall warning if the speed is below 60kt, which is well outside even the flight test envelope. I’m pretty confident that’s the only time an Airbus has been that slow without wheels on the pavement.