Aircraft Slat and Flap System Components
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Questions and Answers

What is the primary purpose of the flap disconnect detection system?

  • To measure the performance of updraft
  • To prevent flap operation in case of attachment failure (correct)
  • To provide additional lift during landing
  • To enhance the flap operation during takeoff

    • Which hydraulic powers are used for the motors operating the slats and flaps?

  • Yellow and red for slats, blue and green for flaps
  • Red and yellow for both slats and flaps
  • Green and blue for slats, yellow and green for flaps (correct)
  • Only green hydraulic power for both components

    • What happens if one SFCC becomes inoperative?

  • Both slats and flaps will cease to operate
  • Slats and flaps will operate at full speed
  • Only slats will operate at half speed
  • Both slats and flaps will operate at half speed (correct)

    • Which system provides feedback on the position of slats and flaps to the SFCCs?

    <p>The IPPU (D)</p> Signup and view all the answers

    What is the role of the WTBs in the slat and flap system?

    <p>To activate in case of uncommanded movement of the surfaces (D)</p> Signup and view all the answers

    What happens when the flap WTB is activated?

    <p>The flight crew can operate slats (C)</p> Signup and view all the answers

    What is the operational speed of slats and flaps if one SFCC is inoperative?

    <p>Both surfaces operate at half speed. (B)</p> Signup and view all the answers

    How do the slats and flaps respond to a failure in the hydraulic system?

    <p>The corresponding surface operates at half speed. (B)</p> Signup and view all the answers

    If the slat WTB is on, what can the flight crew still operate?

    <p>Only the flaps. (D)</p> Signup and view all the answers

    How many slats and flaps are there

    <p>7 slats and 2 flaps</p> Signup and view all the answers

    What’s spends signals to Ecam on slat flap position ?

    <p>IPPU instrument position pick off unit</p> Signup and view all the answers

    Flashcards

    Slat and Flap System Components

    The slat and flap system consists of slats, flaps, ailerons, hydraulics, and control units, all electrically and hydraulically operated on each wing.

    Slat and Flap Control

    The flight crew uses a lever to set the position of slats and flaps, which have five possible positions.

    Hydraulic Power for Slats and Flaps

    The PCU uses different hydraulic fluids (green, blue, yellow) for slats and flaps.

    WTB Activation

    WTBs (Warning & Trip Breakers) stop slat/flap movement if unexpected issues arise (runaway, asymmetry, overspeed).

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    Flap Disconnect Detection

    A system monitors flap attachment for issues and prevents further damage if detachment occurs.

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    What does the IPPU send to the ECAM?

    The IPPU (Integrated Primary Protection Unit) transmits position data about the slats and flaps to the ECAM (Electronic Centralized Aircraft Monitoring).

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    How do slats and flaps operate if a single SFCC is inoperative?

    If one SFCC (Slat & Flap Control Computer) is inoperative, both slats and flaps will operate at half their normal speed.

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    What happens if one hydraulic system fails?

    A failure in one hydraulic system will cause only the corresponding slats or flaps on that side to operate at half speed.

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    Can the flight crew operate slats and flaps when the WTB is activated?

    Even if the WTB (Warning & Trip Breaker) is activated, the flight crew retains control over the slats and flaps; they can still operate them.

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    How does the flight crew control slats and flaps?

    Even if the WTB is activated, the flight crew can manually control both slats and flaps, despite the WTB being activated.

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    Study Notes

    Slat and Flap System Components

    • Seven slats and two flaps per wing, plus two ailerons (with droop function)
    • Surfaces are electrically controlled and hydraulically operated
    • Flight crew controls via flaps lever on center pedestal (five positions)
    • Two SFCCs (Slat and Flap Control Channels): each with one slat and one flap channel
    • PCU (Power Control Unit): two independent hydraulic motors, coupled by a differential gearbox
      • Motors use different hydraulic power: green/blue for slats, yellow/green for flaps
      • POB (Position Override Block): locks transmission when surfaces reach a position or hydraulic power fails
    • Two APPUs (Asymmetry Position & Position Units): measure asymmetry between left and right wings
    • Flap Disconnect Detection System: detects attachment failure and inhibits flap operation to prevent damage
      • Sensor measures excessive differential movement between inner and outer flaps
    • WTBs (Warning and Triggering Brakes): activate for uncommanded surface movement (runaway, asymmetry, overspeed)
      • Cannot be released in flight
      • Use different hydraulic power: blue/green for slats, green/yellow for flaps
    • FPPUs (Feedback Position Power Units): feedback position information to SFCCs
    • IPPU (Interface Position Power Unit): sends position data to the ECAM
    • Partial Operation Considerations:
      • Flap WTB engaged: slats can still be operated
      • Slat WTB engaged: flaps can still be operated
      • One inoperative SFCC: both slats and flaps operate at half speed
      • One inoperative hydraulic system: corresponding surfaces operate at half speed

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    Description

    This quiz covers the essential components and functions of the slat and flap systems in aircraft wings. It includes details on electrical and hydraulic operations, the control mechanisms, and safety systems associated with these critical flight surfaces. Test your knowledge on the various elements and their interactions!

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