As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSTALLED NEW FUEL REGULATOR SHUT-OFF VALVE. AFTER SEVERAL MINUTES OF OPERATION, VALVE BEGAN LEAKING AT BODY HALF. REMOVAL AND INSPECTION REVEALED ALL FOUR SCREWS THAT HOLD BODY HALF TOGETHER TO BE LOOSE WITH TORQUE SEAL IN PLACE. TIGHTENED SCREWS AND RE-TESTED. VALVE STILL LEAKED. REPLACED VALVE WITH NEW UNIT. SUBMITTER SUSPECTED IMPROPER TORQUE USED AT ASSEMBLY. (X)