Fuel pumping   

I sumped a brand new a/c and the fuel came out pink, discovered the proseal that was suppose to be fuel resitant and seal the tank was mixed wrong, fuel bladder was coming apart, entire tank needed to be replaced.

sumping another a/c, a fair amount of water was discovered, also found out the anti-water warning system on our fuel truck failed and took out the trucks filter because the hatch on top was not sealed properly and it had been raining during the week, needed to have the truck vendor come out and repair fuel truck due to all the water. guess what we found in the other helo's we operated, oooppsssss...

all the above a/c burned jet-a, by the way

I sump my a/c per RFM...