If by warning you mean the audible stall warning - that's because below 50 knots, the airspeed is considered unreliable / erroneous, because to get to that spee

If by warning you mean the audible stall warning - that's because below 50 knots, the airspeed is considered unreliable / erroneous, because to get to that speed without flaps you'd have to be stalling the aircraft for over a minute (getting that exact warning) and surely nobody would manage to do that... As I said elsewhere, the airplane was quite literally falling as fast as it was moving forward. I don't really fault the plane for considering that condition erroneous. And it didn't throw away a warning, it instead marks the speed tape with a bright red "SPD" instead of showing any airspeed. This is likely the better alternative over getting persistent stall warnings if one of your airspeed indicators fails. Here's how that condition would've looked: https://docs.flybywiresim.com/pilots-corner/a32nx-briefing/pfd/flags-messages/ https://docs.flybywiresim.com/pilots-corner/a32nx-briefing/p...