Is fuel supposed to be sucked out of tanks?
Look what happens when you give your co - pilot the weekend off!!anic: . Just kidding!!
I wouldn't fill out a report... is it illegal to fly without a gas cap???? (I wouldn't recommend it, but I don't think you need to fill out a ASRS)
Report to NASA enroute. I hope they dont think this is too trivial. If nothing else, filling out the form made me think about the factors that led to me forgetting to replace and secure the cap.