As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CURTIS DRAIN VALVE LEAKING FUEL BECAUSE OF A CRACKED SEAL RETAINER. THIS RESULTED IN A MAJOR FUEL LEAK BECAUSE THE INTERNAL PLUNGER FELL COMPLETELY OUT OF THE VALVE. LEAK RATE WAS ABOUT 2 GALLONS PER MINUTE. HAVE 2 VALVES WHICH ARE DEFECTIVE. SEAL RETAINER NEEDS TO BE MADE OF A THICKER MATERIAL. (K)