What was found
VFR FLIGHT, AT 6000 FEET MSL, ENGINE WENT FROM 5100 RPM TO 3000 RPM. TRANSPARENT FUEL TUBES AT BASE OF WINGS THAT ARE VISIBLE IN THE COCKPIT REVEALED NO FUEL IN LT WING TANK BUT ADEQUATE FUEL IN RT. CARB HEAT, BANKING INTO LT TURN WITH RT WING UP HAD NO BENEFIT. ENGINE QUIT COMPLETELY AT 500 FEET AGL. LANDED DEAD STICK. NO DAMAGE, NO INJURIES. MINUTES AFTER LANDING, ENGINE WAS RESTARTED AND RAN FINE. DIPSTICK SHOWED 5 GALLONS IN RT TANK, NONE IN LEFT. LATER, APPROX 3.5-4 GALLONS OF FUEL WAS DRAINED FROM THE SUMP. REMOVAL OF WINGS REVEALED SOME RESIDUAL FUEL STILL IN WING TANKS.