Have a travel air d95a, right main fuel siphoned out (25 gallons) over about 2 hours. Bladder was sucked up causing fuel sender to indicate full, which is what I expected since I had only about 15 minutes use on that tank. Had to go around for traffic and lost right engine at 400 ft. Replaced Orings on cap, pushed down bladder, fuel indicator works properly showing empty. Fuel vents seem to working properly. Has this been an issue with beech? What else should we be checking?