Question for pilots of the A321 or A319

Discussion in 'Hangar Talk' started by Rushie, Nov 25, 2017.

  1. Rushie

    Rushie Cleared for Takeoff

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    What is that screeching noise that sounds like fingernails on a chalkboard or some mechanical part being tortured just before or during taxiing?
     
  2. mtuomi

    mtuomi En-Route

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    PTU. aka. Power Transfer Unit.
    If the hydraulic pressure between different systems vary by too much, pump will engage and balance the pressure. That's the PTU and it's often described as "the barking dog sound".
     
  3. Larry in TN

    Larry in TN Line Up and Wait

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  4. Zeldman

    Zeldman Final Approach

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    The wing attachments pulling out..???
     
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  5. flyingron

    flyingron Touchdown! Greaser! PoA Supporter

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    Apprehension on the pilot's part when he knows the aircraft is going to critique his landing by calling him names.
     
  6. Rushie

    Rushie Cleared for Takeoff

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    Ah yes, that would be it.

    Thanks guys I watched some videos on it. Mystery solved.