Alternate Law

Also from: Altn Law

Ground and flare mode are the same as in normal law. In flight mode:

pitch control - unchanged
roll control - surface deflection is proportional to side stick deflection (like a conventional control)
yaw control - damping is available with limited authority

Control

The following protections are lost or changed.

	ALT 1	ALT 2
load factor
pitch attitude
high angle of attack	low speed stability	low speed stability, or if 2 × ADR failure
high speed protection	high speed stability	high speed stability, or if 3 × ADR failure
bank angle

Note that, according to failures, the above protections may not be available, leaving only load factor limitation protection.

Name	Axis	Description
Low speed stability	vertical	limits speed loss: at V_SW a nose down input is introduced (can be overridden by the stick)
High speed stability	vertical	limits high speed: above V_MO/M_MO nose up input is introduced (can be overridden by the stick)