Abnormal attitude A330
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Questions and Answers

What triggers the engagement of the abnormal attitude law?

  • Bank angle exceeds 90°
  • Angle of attack below 30°
  • Speed below 70 kt
  • Pitch attitude above 50° nose up or 30° nose down (correct)

    • Which flight control laws are active when the abnormal attitude law engages?

  • Pitch direct law, roll normal law, yaw alternate law
  • Pitch direct law, roll alternate law, yaw direct law
  • Pitch mechanical law, roll alternate law, yaw normal law
  • Pitch alternate law, roll direct law, yaw mechanical law (correct)

    • What indication is displayed on the PFDs when the abnormal attitude law is active?

  • USE AUTO TRIM
  • USE ROLL TRIM
  • USE PITCH ADC
  • USE MAN PITCH TRIM (correct)

    • What happens to the yaw mechanical law when the abnormal attitude law is engaged?

    <p>Yaw mechanical law remains active (B)</p> Signup and view all the answers

    What occurs when the aircraft returns within the normal flight envelope after being in abnormal attitude law?

    <p>Pitch alternate law is active with autotrim (C)</p> Signup and view all the answers

    What law becomes active in the pitch configuration when the aircraft is back within the normal flight envelope? Being in abnormal attitude

    <p>Pitch alternate law (C)</p> Signup and view all the answers

    Which condition remains active for the entire duration of the flight after returning to the normal flight envelope? Being in abnormal attitude

    <p>Roll direct law (D)</p> Signup and view all the answers

    What is the display indication on the ECAM after the aircraft returns within the normal flight envelope? Being in abnormal attitude

    <p>F/CTL ALTN LAW (A)</p> Signup and view all the answers

    Which law is associated with yaw functionality after the aircraft regains normal flight conditions? Being in abnormal attitude

    <p>Yaw alternate law (C)</p> Signup and view all the answers

    Which of the following laws is NOT active when the aircraft returns within the normal flight envelope? Being in abnormal attitude

    <p>Yaw mechanical law (D)</p> Signup and view all the answers

    Flashcards

    Abnormal Attitude Law

    A flight control law that engages when the aircraft's attitude goes beyond normal limits.

    Flight Envelope Limits

    Safe operating boundaries for aircraft concerning pitch, bank, angle of attack, speed (kt), and Mach number.

    Abnormal Attitude Law Engagement

    Conditions, such as exceeding 50° nose-up pitch or 125° bank; the law activates to manage extreme flight attitudes

    Active Control Laws

    During abnormal attitude law activation, specific control laws are engaged for the pilot to recover attitude, but autotrim is disabled

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    Post-Recovery Control Defaults

    Normal laws return when aircraft is back within the envelope; some specific laws remain active, autotrim re-enabled.

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    Pitch Alternate Law

    This law controls the aircraft's pitch when the abnormal attitude law is disengaged, providing assistance in maintaining proper pitch.

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    Roll Direct Law

    This law allows the pilot to directly control the aircraft's roll, providing immediate responsiveness to control inputs.

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    Yaw Alternate Law

    This law controls the aircraft's yaw when the abnormal attitude law is disengaged, providing assistance in maintaining proper yaw.

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    F/CTL ALTN LAW

    This message appears on the Electronic Centralized Aircraft Monitoring (ECAM) indicating that alternate flight control laws are currently active.

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    Autotrim

    This system automatically adjusts the aircraft's control surfaces to reduce pilot workload and maintain a desired flight attitude.

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    Study Notes

    Aircraft Flight Control Laws

    • Extreme attitudes trigger a modified flight control law, the "abnormal attitude law".
    • This law prioritizes pilot recovery of normal flight conditions.
    • The abnormal attitude law activates when specific parameters exceed limits:
      • Pitch attitude above 50° nose up or 30° nose down
      • Bank angle above 125°
      • Angle of attack above 40°
      • Airspeed above 440 knots or below 60 knots
      • Mach number above 0.96 or below 0.1.
    • When the law activates:
      • Pitch "alternate law" is used.
      • Roll "direct law" is used.
      • Yaw "mechanical law" is used.
      • Autotrim is deactivated.
      • "USE MAN PITCH TRIM" is displayed on the primary flight display (PFD).
      • "F/CTL ALTN LAW" is displayed on the electronic centralized aircraft monitor (ECAM).
    • When the aircraft returns to normal flight envelope, the abnormal attitude law disengages, restoring:
      • Pitch "alternate law" with autotrim.
      • Roll "direct law".
      • Yaw "alternate law".
      • "F/CTL ALTN LAW" remains visible on the ECAM.

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    Description

    This quiz focuses on the principles of aircraft flight control laws, especially the abnormal attitude law and its activation parameters. Test your knowledge on how these laws help pilots regain control in extreme flight conditions. Understand the specific actions taken by the flight control laws during abnormal situations and the restoration to normal conditions.

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