I totally agree, a fuel flow readout is an excellent in-flight planning tool. I'm surprised to hear the 139 doesn't have them, especially as it's smaller brother does, displayed on its auxiliary "T's and P's" page of the EDU. The fuel flow in kgs/hr for each engine is shown immediately above the fuel contents. I look at my ETA, compare the fuel flows to the fuel total remaining and can very quickly work out, even in my little brain, how my fuel is working out.
