Originally Posted by
FlapsFortyPilot
Hi!
1. One of the procedures we use before transfering fuel is to check for possible leakage by switching the fuel flow switch to USED and crosscheck if it is correct in relation to what was planned for that stage (Xcheck w/ PLOG). In the lighter aircraft I used to fly, we had the same kind of switch, but it would show us a figure that was derived from the fuel flow transducers, and not the difference in actual tank quantity, which would mean that using this feature wouldn't indicate a leakage even if there was one. So does anyone know where the fuel flow switch gets its information from when moved to the USED position in the 737?
Did you not do the entire checklist, it even wants you to open the crossfeed incase of a fuel leak!!