Please don't go making stuff up unless it's really, really, really, really, non standard ops or something that's way outside of expected ops (KSUX DC-10, Scully/Hudson, Delta KSAN L1011 stab failure, 757 dual deep idle stall, etc, etc).
Oh, the DC-10 in KSUX had redundant hydraulic systems. Redundant, just like the dual fire loops.
The above failures were clear an evident failures of systems and have nothing to do with a false fire warning due to a bleed leak. I am a young man but have experience with old aircraft. A pilot does not have to be a hero to do some simple non-vital troubleshooting, all the above references were vital. Oh I know the DC-10, hey when you have the luxury of a flight engineer to watch all 3 hyd systems dump beyond his control, well this is a hell of allot more threatening than an engine fire warning. Thinking back I was on an MD-11 with 1 loop out on an engine 2.5 hrs into an 8 hr flight, the 2nd loop failed and we simply returned to base. We all knew we had simply lost reliable indication and understood the consequences.
No need to freak out when bitching Betty comes alive, she deserves respect, a little logic is extremely valuable when situational awareness is key!