Just checked the bag in the UAT from my BobCat which was installed when I had the RAM 500 flame out at low rpm. The bag is discoloured but seems to have very little or no resistance when blown through.

The bottom line is I have NEVER had a flame out using centered pickups in header tanks. Is the UAT really as good as is claimed and is it an overcomplication with the potential to cause the very problems it was designed to eliminate ?

After almost three years there is no sign of algae growth in my F4 tanks or tubing, the filter is almost clinically clean and after 4 years of use the F15 tanks etc are the same and neither has suffered a single flameout on the AMT Peg or JetCat 80, 120 or 160. I have used almost exclusively Jet A1 and the cleanliness , as proven by the refuelling line and airborne filters has been near perfect. Nothwithstanding Gordon Dickens pst, if you get dirty Jet A1 fro am Aviation source that is unacceptable. and very worrying and should be brought to the attention of the fuelling company.
BRG, David Gladwin.