Morgans wrote:

"Ben Hallert" wrote

I wonder if these low-fuel sensors are part of the system that shuts
down the SSMEs if there's a fuel starvation issue. I remember a
mission a few years back where MECO (main engine cut-off) was
unexpectedly a few seconds early because of higher then projected fuel
burn or something. Not enough to really impact the mission, but it
showed the safety systems that prevent dry-running SSMEs was working.

That was exactly the problem. The main engines shut off at zero fuel
level,
and with the sensor reading zero fuel, the engine would not even start.
Not
a "good' thing.

There are four sensors - NASA could have removed this (apparently) faulty
sensor from the voting.

Hilton