Sounds heard after push back

[RCTP]

Hi all,

Have been puzzled by this particular sound that I hear in the cabin right after pushback.

It kinda sounds like an old creaky door opening slowly.

Just wondering what it is.

[sqdazz]

Aircraft type ? If a320 series it may be the hydraulic ptu

[RCTP]

Aircraft type ? If a320 series it may be the hydraulic ptu

Yup! I was in an A320. what's "hydraulic ptu"?

[9V-JKL]

Power Transfer Unit

[sqdazz]

wiki here

[JonLee]

Almost every aircraft will have these sounds with the lights flickering, although it is less common on the A380

[sqdazz]

Almost every aircraft will have these sounds with the lights flickering, although it is less common on the A380

The lights flicking would more likely be the electric generators switching from apu to engine afaik.

[JonLee]

The lights flicking would more likely be the electric generators switching from apu to engine afaik.

LOL you are right i got confused somehow