Airbus aircraft designs after the a300 a310 are almost completely controlled by fly by wire equipment.
Airbus a320 alpha floor.
In this case we could have alpha floor activation at fl390 example.
These newer aircraft including the a320 a330 a340 a350 and a380 operate under airbus flight control laws.
The amber boxed a floor annunciation is displayed when the speed is between alpha max and alpha protection and the auto thrust system commands to ga thrust regardless of thrust lever position.
The alpha floor function is not available below 100 feet ra or during single engine operation with flaps at conf 1 or greater.
That is my understanding of the whole thing.
Alpha floor is also triggered if the pilot applies a large aft stick input while either pitch attitude or angle of attack protection is active.
You deserve to feel at home even when you re on the move.
The α floor function is not available below 100 feet ra or.
On the a320 alpha floor is not inhibited above m0 53.
The only reason i try to understand this is to get a better understanding of the airbus mishaps that interest me.
Alpha floor occurs at a predetermined angle of attack.
V alpha prot and v alpha max are removed they are replaced by a red and black barber pole the top indicating the stall warning speed v sw a nose up command is introduced any time the airplane exceeds v mo m mo to keep the speed from increasing further which can be overridden by the sidestick.
The best thing i would say the only thing as well as airbus industrie would say to do should you have an alpha floor situation triggered off.
Alpha floor protection is inhibited in some cases.
The flight controls on the airbus a330 for example are all electronically controlled and hydraulically activated.
The a floor engaged mode changes to toga lk when a floor conditions no longer exist.
Would be to decrease the angle of attack alpha as much as possible and once the toga lock is displayed on the ecam to disconnect the alpha floor as per procedure.