Fuel
for the Santa Barabara to Hilo leg, we had 50gals in the wings, RHS seat was replaced witha 38g tank, the rear seats were replaced with 61 & 42 gal tank respectively, so total of 191gals. Landed in Hilo with full wing tanks....FAA have to sign off the change so you get a speciual flight permit. First time a DA40 had done this with NoCal FAA, so took a while for them to issue the SFP. According to the tanking company, possible to get a 30% over MTOW, subject to CofG, and aircraft type. Think we were 24% ow from memory...