Re: I can't get the sensor to fit
Oooh, my cue to post the L5 ground loop audio from Eileen Collins's launch. Stay with it for the low LOX level premature SSME cut-off half a sec before the scheduled MECO, which IIRC was due to a big hole in a nozzle cooling circuit. (The auto cut-off is there because apparently cryogenic gas turbopumps tend to explode if suddenly fed vacuum when running.)
Oy, this makes the hair on the back of my neck stand up every time I watch it!
And there's a WP article of course.