Machinbird, you commented, " Keep in mind that the boiling point of water at FL350 isn't that high. Much less than 100 degrees C/ 212 degrees F."
Is this the right observation. What is the pressure IN the pitot-tube and the tubing up to the ADIRU? (And, for that matter, what is the temperature of the probe and of the tubing up to the ADIRU?)
JD-EE