Abnormal Attitudes Law

The abnormal attitude law engages when one of the following values is reached:

  • Bank angle above 125 °
  • Pitch attitude above 50 ° nose up or below 30 ° nose down
  • Speed below 60 to 90 kt (depending on the aircraft pitch attitude), or above 440 kt
  • Mach above 0.91
  • Angle of attack above 30 ° to 40 °, or below -10 °

Before and After Entry into Abnormal Attitude Law

When the abnormal attitude law engages:

  • The pitch alternate law is active with no protection, except load–factor protection and without autotrim.
  • The roll direct law is active
  • The yaw mechanical law is active.

When the aircraft returns within the normal flight envelope, the abnormal attitude law disengages and the following conditions remains for the remainder of the flight:

  • The pitch alternate law is active with no protection and with autotrim.
  • The roll direct law is active
  • The yaw alternate law is active.
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