What is this?

Lol I know this is kinda… well very random but what is this (it’s in the 777s)

1 Like

That hole at the back?

Yes… That

That is the apu exaust.


Ok, I thought it was some type of exhaust I just wasn’t sure and was very curious:)


Yes, is the apu exhaust

Don’t worry. Curiosity is a good thing. It is good to be curious.


Defo, no such thing as a stupid question.

1 Like

It’s where the 777 gives birth from.


That is just referred to as “its hole”.

1 Like

(post withdrawn by author, will be automatically deleted in 24 hours unless flagged)

What sort of engine does an Auxiliary Power Unit have?
It really makes a lot of noise!
I much rather hear a jet engine. ;)
Does it run on jet fuel?

It uses the same fuel as the normal engines. The fuel is taken from the normal fuel tanks.

It is only on at the gate until the engines are started after pushback, and again once you land until the ground power is connected at the gate (unless under ETOPS).

It is a small jet engine, some information here https://en.wikipedia.org/wiki/Auxiliary_power_unit#Transport_aircraft

1 Like

Zaid, this is a forum with kids. Mind your words


Just delete it, sorry😅