Spoiler Deflection Limits in Configurations
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Questions and Answers

In which configurations is the maximum deflection for the spoilers reduced?

  • FULL only
  • CONF 1, 2 and 3
  • CONF 2 only
  • CONF 2, 3 and FULL (correct)

What happens to the speedbrakes if an inhibition occurs when they are extended?

  • They automatically retract and stay retracted until the inhibition condition disappears. (correct)
  • They remain extended until the flight crew manually retracts them.
  • They get damaged and need to be repaired before being used again.
  • They retract but can be extended again immediately.

Under what condition can the speedbrakes be extended again after being inhibited?

  • 5 seconds after the inhibition condition ends and the lever is reset. (correct)
  • Only during landing procedures.
  • As soon as the flight crew indicates readiness.
  • They can never be extended again after an inhibition.

What action must the flight crew take after a speedbrake inhibition occurs?

<p>They must reset the lever to allow reextension of the speedbrakes (D)</p> Signup and view all the answers

How long does a flight crew need to wait after resetting the lever before the speedbrakes can be extended again? In case of inhibition situation

<p>5 seconds after resetting the lever. (B)</p> Signup and view all the answers

What is the main function of ground spoilers 1 to 6?

<p>To act as ground spoilers (C)</p> Signup and view all the answers

What happens when a ground spoiler surface on one wing fails?

<p>The other wing's symmetric spoiler is inhibited (D)</p> Signup and view all the answers

What triggers the automatic extension of ground spoilers during the Rejected Takeoff phase when they are armed?

<p>When all thrust levers are set to idle after wheel speed exceeds 72 kt (B)</p> Signup and view all the answers

During which phase will ground spoilers extend automatically if they are armed both thrust. Levers idle and both main landing gears have touched down?

<p>Landing phase (B)</p> Signup and view all the answers

What condition leads to partial ground spoiler extension?

<p>When reverse is selected on at least one engine [Other engine idle ] and one main landing gear is compressed (D)</p> Signup and view all the answers

When do ground spoilers retract?

<p>When any thrust lever is above idle or all thrust levers forward idle and speed brake lever pushed down . (B)</p> Signup and view all the answers

What happens if the ground spoilers are not armed during landing when both main landing gears touch down?

<p>They will extend once reverse is selected on at least one engine ( Remaining engine idle ) (C)</p> Signup and view all the answers

What condition must be met for the ground spoilers to automatically extend when reverse is selected? When not armed

<p>At least one engine must be at idle. (A), The ground spoilers must be armed. (D)</p> Signup and view all the answers

What must be true about the remaining engine. , for ground spoilers to operate automatically when the other is in reverse .?

<p>It must be at idle. (B)</p> Signup and view all the answers

If the wheel speed is 75 kt and the ground spoilers are armed, what will happen once reverse is selected on one engine( Other engine idle ) ?

<p>Ground spoilers will extend automatically. (A)</p> Signup and view all the answers

On take off At what wheel speed do the ground spoilers begin to function automatically upon reverse selection (Other engine idle ) when speed brakes not armed ?

<p>Above 72 kt. (A)</p> Signup and view all the answers

What condition does NOT inhibit speedbrake extension?

<p>Thrust lever is at MCT position. (C)</p> Signup and view all the answers

Which of the following scenarios would result in speedbrake extension being inhibited?

<p>Low speed stability is active. (A)</p> Signup and view all the answers

Under which condition will speedbrake extension still be allowed?

<p>Both thrust levers are at MCT position. (D)</p> Signup and view all the answers

Which option is a condition that will NOT inhibit speedbrake extension?

<p>At least one thrust lever is below MCT position. (A)</p> Signup and view all the answers

What happens to speedbrake extension when MLA is activated?

<p>Speedbrake extension is inhibited. (A)</p> Signup and view all the answers

Flashcards

Spoiler Deflection

The maximum amount a spoiler can move.

CONF 2, 3, and FULL

Configurations of a system where spoiler deflection is limited.

Maximum Deflection

The largest possible movement of a part.

Reduced Deflection

The maximum deflection is decreased or lower.

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Spoiler Configurations

Different settings for spoilers.

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Speedbrake Inhibition

A condition that prevents the speedbrakes from extending, even when the lever is moved.

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Automatic Speedbrake Retraction

When an inhibition occurs, the speedbrakes will automatically retract and remain retracted until the inhibiting condition is gone.

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Speedbrake Reset

The action of resetting the speedbrake lever after an inhibition has cleared, allowing the flight crew to extend the brakes again.

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5 Second Delay

After resetting the speedbrake lever, there is a 5-second delay before the brakes can be extended again.

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Speedbrake Inhibition Conditions

Specific situations that cause the speedbrakes to be inhibited, preventing them from extending.

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Ground Spoilers

Spoilers 1 through 6 act as ground spoilers, helping to slow the aircraft down during landing and taxiing.

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Spoiler Inhibition

If one ground spoiler surface fails, the corresponding spoiler on the other wing is automatically disabled to prevent issues with the aircraft's handling.

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Arming Ground Spoilers

The pilot arms the ground spoiler function by pulling the speedbrake control lever up into the armed position.

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What happens when a ground spoiler surface fails?

When a ground spoiler on one wing malfunctions, the symmetrical spoiler on the opposite wing is immediately inhibited.

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Why is the opposing spoiler inhibited?

Inhibiting the opposing spoiler maintains a balanced control over the aircraft, avoiding any unwanted or unexpected movements.

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When do ground spoilers extend fully?

Ground spoilers extend fully during a rejected takeoff when the wheel speed exceeds 72 kt and all thrust levers are at idle, or when both main landing gears touch down and all thrust levers are at idle.

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What triggers partial spoiler extension?

Partial spoiler extension happens when one main landing gear is compressed and reverse thrust is selected on at least one engine.

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How are ground spoilers retracted?

Ground spoilers retract when one thrust lever is above idle, or when all thrust levers are at forward idle and the speedbrake control lever is pushed down.

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What is the purpose of the partial spoiler extension?

Partial spoiler extension eases the compression of the second main landing gear, by reducing lift, and ultimately leads to full spoiler extension.

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How are ground spoilers armed?

The pilot arms the ground spoiler function by pulling the speedbrake control lever up into the armed position.

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What triggers automatic ground spoiler extension?

If the ground spoilers are armed, the wheel speed exceeds 72 kt, and reverse thrust is selected on at least one engine, the ground spoilers will automatically extend.

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Ground spoiler arming

The pilot arms the ground spoilers by pulling the speedbrake control lever up into the armed position.

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Ground spoiler inhibition

If one ground spoiler surface fails, the corresponding spoiler on the other wing is automatically disabled to maintain balanced control.

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Speed limit for automatic spoiler extension

The ground spoilers will only automatically extend if the wheel speed is above 72 kt.

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Full spoiler extension

Full ground spoiler extension occurs when the aircraft's main landing gears touch down and all engines are at idle, or during a rejected takeoff with wheel speed above 72 kt and all engines at idle.

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Speedbrake Inhibition Triggers

Several situations cause the speedbrakes to be inhibited, including: MLA activation, angle-of-attack protection, low-speed stability activation, at least one thrust lever above MCT, or alpha floor activation.

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MCT Position

MCT position refers to the 'Maximum Climb Thrust' setting on the thrust levers. When at least one lever is above this setting, the speedbrakes are inhibited.

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Alpha Floor

Alpha floor is a system that limits the aircraft's angle of attack, preventing a stall. When activated, it also inhibits the speedbrakes.

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Study Notes

Spoiler Deflection Limits

  • The maximum deflection allowed for spoilers is reduced in configuration 2, 3, and full compared to other configurations.
  • This reduction in maximum deflection is a design choice impacting operational parameters and performance.
  • The specific reasons for the reduced maximum deflection in those configurations (2, 3 and full) are not specified.
  • The implications for overall system performance and functionality require further analysis considering the contexts of each configuration.

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Description

Explore the design choices related to maximum deflection limits for spoilers across various configurations. Understand how these limits impact operational parameters and overall system performance. This quiz encourages further analysis of the implications for different configurations.

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