What was found
AFTER TAKEOFF, AMBER CAS MESSAGE WING O FULL RT ILLUMINATED. FUEL CAN BE VISUALLY SEEN DUMPING OUT OF RIGHT WING FROM VICINITY OF SURGE TANK VENT. FUEL IMBALANCE BECAME EVIDENT AT A RATE OF APPROX 100 LBS PER MIN. PRESSURIZED RIGHT WING, FOUND NO LEAKS IN DRY BAYS BETWEEN FUEL & SURGE TANKS. REMOVED SURGE TANK VENT FLOAT PANEL, FOUND VENT FLOAT STUCK TO OUTBOARD FLAP JACKSCREW DRAIN LINE, FREED VENT FLOAT FOR UNOBSTRUCTED FLOAT MOVEMENT. RE-INSTALLED ALL PANELS, ALL WORK DONE IAW CESSNA 750 MM CHAPTER 28-10-04, OPS CHECK GOOD.