@RVDT ... Our 135P2+ in much higher S/N than 250 (late 600īs), and during flight we have 44kg / 40 kg indication (84 kg). When you approach to very low fuel state in the MAIN tank, letīs say less than 10 kg, indication is something like (40-44 / 10 / 36-38 kg ), soon followed with F PUMP FWD caution on CAD...
...if 95 lit (76 kg) was removed from the system, he was probably on supply tanks in approach for landing, which is normal situation.
Unusable fuel with FWD Transfer failure above 80 knots = 59 kg.
...important to emphasize (to escape confusion for somebody)...unusable fuel in the MAIN tank is 59 kg...not in the supply tanks (where is additional 84 or 92 kg)...