I just (re-)installed FACET fuel pump, after fitting Aeroquip hose. Original tubing was not so good and it touched the floor, so I also changed tubing.
Before attaching definitively tubing on pump and torque nuts, I blew inside the pump and noticed that air flow is very difficult: you have to blow quite strong to obtain little air to pass through (far less than the normal air flow inside the tubing itslef). I'm wondering if this will cause problems to fuel flow when FACET pump will be off or if it breaks suddenly during take-off. Maybe engine pump will produce enough depression to suck enough fuel. I'm a bit worried...
Before attaching definitively tubing on pump and torque nuts, I blew inside the pump and noticed that air flow is very difficult: you have to blow quite strong to obtain little air to pass through (far less than the normal air flow inside the tubing itslef). I'm wondering if this will cause problems to fuel flow when FACET pump will be off or if it breaks suddenly during take-off. Maybe engine pump will produce enough depression to suck enough fuel. I'm a bit worried...