Quote:
The requirement of a minimum fuel temperature on the ATR seems a bit odd to me; it must be related to the points of measurement on the engine installation.
I'm not familiar with the specifics of the PW123/150, but a fuel/oil heat exchanger is commonly used to prevent fuel icing - and that takes a minimum oil temp to be effective. So if the oil isn't warm, the fuel can't be cold enough for icing to be a threat.