Aircraft Energy Management Alert System

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Questions and Answers

What does the low energy aural alert 'SPEED SPEED SPEED' indicate to the pilot?

  • The aircraft energy is lower than a threshold. (correct)
  • The landing gear is not properly configured.
  • The aircraft is traveling too fast for safe flight.
  • The aircraft is entering a stall condition.

Under what conditions will the low energy aural alert NOT be triggered?

  • When the aircraft is airborne below 2000 ft RA.
  • When TOGA is not selected.
  • When the aircraft is below 100 ft RA. (correct)
  • When alpha floor is not triggered.

Which inputs does the low energy aural alert rely on for its computation?

  • Pilot's experience level, weather conditions, flight duration.
  • Aircraft weight, engine power, wind speed.
  • Aircraft configuration, pilot's altitude, throttle position.
  • Aircraft configuration, air speed deceleration rate, flight path angle. (correct)

What happens immediately after the low energy aural alert is triggered if nothing changes?

<p>ALPHA Floor alert is activated. (A)</p> Signup and view all the answers

At what altitude range is the low energy aural alert available?

<p>From 100 to 2,000 ft. (A)</p> Signup and view all the answers

What is the frequency of the low energy aural alert 'SPEED SPEED SPEED'?

<p>Every 5 seconds (D)</p> Signup and view all the answers

At which altitudes is the low speed alert available?

<p>100 to 2000 ft (D)</p> Signup and view all the answers

In which configurations can the low speed alert be activated?

<p>Configuration 2, 3, and full (D)</p> Signup and view all the answers

Flashcards

Low Energy Alert

An aural alert signaling insufficient aircraft energy for maintaining a positive flight path angle, prompting thrust increase.

Alert Triggering Condition

Aircraft energy drops below a threshold, based on configuration, airspeed deceleration, and flight path angle (FPA).

Alert Activation Altitude

Activations between 100 and 2000 feet above ground level (AGL).

Alert Inhibitor

Conditions like TOGA selection, low altitude (below 100 ft), high altitude (above 2000 ft), Alpha floor or GPWS alert engagement.

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Alert Computation

The alert is calculated using aircraft configuration, airspeed deceleration rate, and flight path angle by the flight management system (PRIM).

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SPEED Alert Frequency

The "SPEED SPEED SPEED" aural alert is repeated every 5 seconds.

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SPEED Alert Purpose

The "SPEED SPEED SPEED" alert signals that the aircraft may not have enough energy to maintain a safe climb.

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SPEED Alert Conditions

The alert activates when the aircraft's energy drops below a certain threshold, based on factors like speed, altitude, and flight path angle.

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SPEED Alert Inactivation

The alert can be deactivated by increasing thrust or by changing the aircraft's configuration.

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SPEED Alert Importance

The "SPEED SPEED SPEED" alert is a critical safety feature, designed to help pilots avoid potential loss of control or an accident.

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Low Speed Alert

A warning system that activates when the aircraft is losing speed too quickly, especially during takeoff or climb.

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Low Speed Alert Configurations

This alert is available in configurations 2, 3, and full.

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When does Low Speed Alert Activate?

The alert activates between 100 and 2000 feet above ground level (AGL).

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Low Speed Alert Function

This alert helps pilots maintain enough energy for a safe climb and reduce the risk of stalls.

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What do they do?

If the alert sounds, the pilot should increase engine power to regain speed or change the aircraft's configuration to improve lift.

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Study Notes

Low Energy Aural Alert

  • A low energy aural alert, repeating "SPEED SPEED SPEED" every 5 seconds, warns the pilot of decreasing aircraft energy below a recovery threshold.
  • The alert indicates the need to increase thrust to regain a positive flight path angle (FPA).
  • The alert is activated when aircraft energy falls below a threshold between 100 and 2,000 ft altitude.
  • Alert availability depends on configuration (2, 3, or full).
  • Alert triggering speed depends on the aircraft's flight path angle (FPA) during deceleration. For example, at -3° FPA, the alert triggers at approximately VLS -8; at -4° FPA, at approximately VLS -2.
  • The alert prioritizes prompting pilots to adjust thrust using the SPEED scale.
  • It occurs immediately before the ALPHA Floor alert.
  • The alert is calculated by the PRIM system using aircraft configuration, air speed deceleration rate, and flight path angle.

Alert Limitations

  • The alert is disabled during:

    • TOGA selection
    • Below 100 ft or above 2,000 ft.
    • Alpha floor or GPWS alert activation.
    • Failed vertical speed (RA) sensors in alternate or direct law.

  • Alert timing relative to the ALPHA Floor depends on deceleration rate. Alert delay occurs if deceleration happens before ALPHA floor unless an ALPHA floor is triggered by stick deflection in which case there's no delay.

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