As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PART WAS RECEIVED TO REPLACE EXISTING PART DUE TIME CHANGE. WHEN PART WAS INSTALLED, PART FUNCTIONED FINE. WHEN FUEL WAS INTRODUCED TO SYSTEM FOR LEAK CHECK, UNIT WAS FOUND TO NOT HOLD SEAL. THIS IS THE FIRST OF 2 VALVES FROM THE SAME FACILITY THAT HAVE LEAKED WHEN INSTALLED ON AIRCRAFT. FUEL CROSSFEED VALVE. (K)