Airbus A321-200 PTU Noise

In aviation, a power transfer unit (PTU) is a device that transfers hydraulic power from one of an aircraft's hydraulic systems to another in the event that second system has failed or been turned off.
The PTU is used when, for example, there is right hydraulic system pressure but no left hydraulic system pressure. In this example, the PTU transfers hydraulic power from the right hydraulic system to the left hydraulic system. A PTU consists of a hydraulic motor paired with a hydraulic pump via a shaft.

[@AEONQU]

Who let the dogs out 😂

[@khaledalharabi]

Very funny 😂wow

[@jorgehernanfernandezmardon7257]

😂

[@Voyager.2]

Love that sound, reminds me that I am on a A32x and boy, It gives me peace of mind.

[@marcosveltmanus2997]

I always watching the faces of people when the sound appears. A lot of people think that theres something wrong lol.

[@flanksy-gv4mz]

I love this sound

[@emirkurt66]

Very Nice PTU Sound!

[@Nate_Broflovski_official]

An angry a321 yelling at a b737 😅

[@fozanshaque6094]

this is so nostalgic

[@PixelGamerr.]

I remember on my flight on an A321-252NX I heard this sound

[@user-uw3jh4sl8o]

I got scared when I heard that lol(it happened before I became an Avgeek)

[@KnittingPasta]

I know there's nothing wrong with it. But why did the designers not sound proof the cabin or go with a quieter ptu?

[@Ama-hi5kn]

The first time I rode in an A320 I wondered what the hell was going on. But then I got used to it.

[@gingyblox4927]

Yo I’m a big fan of JetBlue that I can tell by the wing this is jetblue

[@subaruserenity]

Close! This was Delta!

[@gingyblox4927]

@@subaruserenity you gotta be serious😂 aw it looks like the wing is like blue on the thing man😂

[@gingyblox4927]

I’m a fan of delta too yk but I’m a bigger fan of JetBlue ya know.

[@subaruserenity]

@@gingyblox4927 I’ve actually never flown on jet blue tbh. The winglets look very similar for sure though!

[@gingyblox4927]

@@subaruserenity yep I flew JetBlue like many times and it’s great it actually makes me wanna be a JetBlue pilot like in 3 years or so cuz I’m literally like I love JetBlue man you have no idea how much I love that airline. Well delta can be good too but I’m not a big fan of it hah

[@Random_shit568]

It sounds like my dog

[@user-md7wh2oh5d]

The ptu sound like a baby dog😂😂