RE: BVM UAT: Leaking air under heavy G loads ??
Wojtek
Had the same issue in Indiana with my KingCat an a RTI engine. I would do a standard pattern style turn around and would puff a long smoke trail. Thought it was a pump issue but it turned out to be my UAT was dirty. This KingCat has at least 175+ flights on it changed my UAT to a brand new one and had no more problems the rest of the week I was there and still have had no more flame out issues from fuel draw.
Oh ya my line coming from the UAT to the pump was stretched even though the nut was tight it might had been leaking from there as well. My bag in my UAT had a brown coating all over it.