APU fuel purging vent push button
 

Hi ..
I tried to find any hint / usage for that switch located at the aft bulkhead for apu venting fuel feed lines ?
are there any mechanic used it !
https://cimg2.ibsrv.net/gimg/pprune....85e04ce0a7.png

It's possible that it is used to run the fuel pump in the event of changing an APU or fuel lines to purge air or preservation fluids. I've not worked on a 320 for many years and don't have the manuals but I think it's along those lines.

https://cimg9.ibsrv.net/gimg/pprune....cf4dc3bf70.png

Many thanks 🙏