As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING MAINTENANCE, LEFT WING TIP FUEL CAP WAS REMOVED AND IT WAS NOTICED THE ANTI-SYPHON VALVE WAS DAMAGED. IT APPEARS THE NOZZLE FROM THE FUEL TRUCK SOME HOW TIPPED BACK, IN TURN, BENDING AND SPLITTING THE BODY OF THE ANTI-SYPHON VALVE. THE VALVE WAS REPLACED.