I didn’t know the engineers won that one on running any lines but fuel probes in a fuel tank. They would propose doing such as it looks good on paper but us maintenance guys told them what could go wrong. This was one of the minor problems one might encounter.
Somebody please tell me that they’re not using fuel for avionics cooling. Engineers have suggested it in the past.
The F-35 has fully liquid cooled avionics using a close cycle liquid system. So they had to dump the heat somewhere. Not surprising that something that novel has some teething.
The F-35 uses the fuel in the tanks to cool the avionics. Because of this, the Air Force has had to build special shade canopies for their F-35s and to paint their fuel trucks white, in hopes of keeping the fuel temperatures low.
I'm not sure what happens when the aircraft goes bingo fuel. I guess you have to shut down the radar and mission computers.