As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) FUEL WAS NOTICED LEAKING FROM THE HEATER FUEL PUMP VENT LINE. THE FUEL PUMP WAS DISMANTLED AND THE DIAPHRAM WAS FOUND TO HAVE FAILED CAUSING FUEL TO LEAK DOWN TO THE BEARING, REMOVING ALL LUBRICATION AN ALSO FALLING. THE FUEL PUMP WAS REPLACED.