What was found
FUEL WAS OBSERVED RUNNING OUT OF THE FUEL REGULATOR/SHUTOFF VALVE DRAIN CAVITY ON THE FRONT HEATER DURING A ROUTINE HEAT OR MAINTENANCE CHECK. FURTHER INVESTIGATION REVEALED THE VALVE WAS LEAKING FROM THE MATING SURFACE BETWEEN THE VALVE BODY AND THE REGULATOR PORTION OF THE VALVE. SUSPECT A TORN DIAPHRAGM IN THE REGULATOR. REPLACED VALVE WITH A NEW UNIT. HEATER FUNCTIONALLY CHECKED SATISFACTORY. THIS IS THE FIFTH MALFUNCTION OF THIS VALVE ON THE COMPANY'S ACFT IN RECENT MONTHS.