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What is alpha floor in aviation?
A system designed to prevent an aircraft from reaching very near its critical angle of attack because of slowing down too much. The system automatically increases the thrust of the aircraft when speed is predicted to reach or exceed the critical angle of attack.
What is alpha floor?
the alpha floor is the max angle of attack at which in an Airbus the alpha floor protection comes on and the airplane produces TOGA-thrust.
What does a floor mean in Airbus?
Alpha floor protection is an Airbus low speed protection available in Normal Law which will command full power from the engines if the system detects the aircraft is dangerously close to a stall.
Is it possible to cancel alpha floor?
The only way to cancel alpha floor is by disengaging the A/THR function.
Is Alpha floor available in alternate law?
α-Floor protection is not available so conventional pilot stall recovery action is required. Load Factor and Bank Angle Protections are retained. High Speed and High Angle of Attack Protections enter Alternate Law mode. Pitch Attitude Protection is lost.
How do I get out of TOGA LK?
TOGA LK appears on the FMA to indicate that TOGA thrust is locked. The desired thrust can only be recovered by setting A/THR to off, with the instinctive disconnect pushbutton.
How does toga work on an Airbus 320?
When the speed decreases, so that the angle-of-attack reaches the ALPHA FLOOR threshold, A/THR activates and orders TOGA thrust, despite the fact that the thrust levers are at IDLE. When the aircraft accelerates again, the angle-of-attack drops below the ALPHA FLOOR threshold. TOGA thrust is maintained or locked.
What does toga lock mean on an airplane?
“TOGA Lock” (TOGA LK) indicates to the pilots that TOGA (Take Off Go Around) thrust has been set on the engines automatically and is “locked”. This will be the active auto thrust mode when the flight crew leave the conditions that originally triggered the Alpha Floor warning.
When do you get out of toga LK?
The procedure to get out of TOGA LK is described in the FCTM (Flight Crew Training Manual): When the aircraft’s angle-of-attack goes beyond the ALPHA FLOOR threshold, this means that the aircraft has decelerated significantly (below ALPHA PROT speed): A/THR activates automatically and orders TOGA thrust, regardless of the thrust lever position.
How to cancel alpha floor or toga LK PPRuNe forums?
Once you get out of the conditions for AF, you will see TOGA LOCK. Move the TLs back 2 clicks to the Clb gate, cancel the A/Thr using the instinctive Pbs (only one will do), and then press the A/Thr Pb on the FCU and you are back to normal.