[T.B. Yoits]

I would check the black box to see if the crew was playing with the switches.

https://gulfnews.com/world/asia/india/junior-pilot-asked-air-india-captain-why-fuel-switches-were-off-1.500201076

[volare737]

That would have absolutely nothing to do with an engine fire—except they would turn the fuel control OFF on the engine once if was on fire.