Originally Posted by
GoldenEagle1
The red filler cap with a lanyard is an alternate provided in the Jersey Modeler jet kit. The vent plug is 'T' shaped with a "Remove Before Flight" flag. Been using the same filler cap on my AreS XL for about 100 flights with no problems. All fuel lines are safety wired except for where the tygon line from the filler cap goes into the UAT where it has a screw-on clamping sleeve.
Take a look at the red cap inside. If it is like mine, you will see the top phillips screw going through the plastic without anything to make it air tight. This is an air leak waiting to happen.