Auto Thrust FMA

Alpha Floor

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. ALPHA FLOOR occurs at a predetermined angle of attack.

The A FLOOR engaged mode changes to TOGA LK when A FLOOR conditions no longer exist.

The α floor function is not available below 100 feet RA or during single engine operation with flaps at CONF 1 or greater. Alpha floor protection is only available in normal law.

To view all FMA definitions see Section 13.3.0 Flight Mode Annunciations.