Why are you all so focused on asymetric flap for crying out loud?!
Air speed reducing and stall speed increased presents more danger
And yes we are talking while a pilot is learning kinda pre ppl level not at your advanced cpl and beyond level!
Because during a turn there is a lot of focus on attitude and spatial orientation. An asymmetric flap condition can come on quickly if not picked up (if your focus is on the turn perhaps?) and can result in uncontrollable flight.
Why is airspeed reducing? The airspeed should be constant throughout the turn.
Oh I didn't realise instructing stopped at PPL stage.