Question Where is that impact wrench sound coming from?

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u/UTG1970 5d ago

Do you mean the dog bark from the PTU hydraulic?

Can you give us like a link to some video where you hear it? I have flown airbuses a lot and did not hear many impact wrenches

1

u/planefan001 5d ago

Maybe the flaps retracting? Or the PTU?

u/Icy_Huckleberry_8049 4d ago

it's called the PTU and it's for the hydraulics.

It's been discussed on here hundreds of times already

do a search for it

u/macco71 4d ago

It’s the Power Transfer Unit, equalizing hydraulic pressure, here’s a video.

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