As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WING TANK OVERFILL "R" CAS MESSAGE ILLUMINATED INFLIGHT AND VENTED ABOUT 300LBS. OF FUEL IN ABOUT A MINUTE. THE RIGHT TANK CONTINUED TO VENT FUEL INTERMITTENTLY DURING DESCENT AND STILL VENTED FUEL WITH 2900LBS. - TROUBLESHOT SYSTEM, DEFUELED A/C AND FOUND (1) TWISTED O-RING IN CENTER WING FLOAT VALVE LINE. REPLACED ALL O-RINGS ON LINE WITH NEW P/N MS29513-214. REMOVED AND REPLACED CENTER WING FLOAT VALVE WITH NEW. OPS CHECKS AND LEAK CHECKS GOOD. WORK DONE PER CE750 M/M 28-10-04.