I am absolutly pulling my hair out with a UAT problem. My first 3 flights on my new lightning have all ended in dead sticks. I am using a Artes Rhino, 2 Comp arf tanks, and a BVM UAT. I am getting air pulled into the UAT which eventually unprimes the fuel pump and the turbine quits. I have done everything imaginable to fix this problem. I have double safety wired every connection, replace all fuel lines, and I still get Air bubbles. I have tried 4 UAT tanks and still get the same problem. I have even extensively tested each UAT by taking it out hooking the fuel pump side to my Jersey fueler, dropped a new line straight into the jersey tank completely submerged, safety wired all connections, pull from the UAT, and I still get small air bubbles in the UAT. I am completely out of ideas on how to solve this Frustrating problem. Does anyone have any idea what is happening?

Thanks,
Buzz