@ Sunfish Post 739
Similarly Boeing would be well aware of the risk and catered for it in its design
But I have to add that sometimes even FMECA Failure Mode and Effects Analysis (of which I am sure you are aware) and best design practice can miss certain possibilities.
Just as an example take the PH co-cylindical tailfin actuator - unpredicted behaviour due to dirt ingress on 737. Enough said.
Maybe a SINGLE temp thermistor in just one tank is not appropriate.
Maybe current min. fuel temp in combination with the way it gets measured, is not appropriate.
Although Occam indicates the likelyhood of the simplest potential cause it does not at this stage exclude the other "way out" possibilities such as EMI. Be tolerant. You can always claim you were right when others are finally proved wrong.
@ Airfoilmod
Cranfield might be more appropriate! It's certainly nearer.