As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE EMERGENCY FUEL SHUT OFF VALVE HAD FAILED THE INTERNAL LEAK RATE OF 1 LITER PER HOUR. A NEW VALVE WAS ORDERED UNDER WO# 267A-2019-I-0049-0093 AND IT TOO FAILED THE INTERNAL LEAK RATE CHECK. ANOTHER NEW VALVE WAS ORDERED UNDER THE SAME WO# AND IT FAILED THE INTERNAL LEAK RATE CHECK AS WELL. THE THIRD NEW VALVE ORDERED PASSED THE LEAK RATE CHECK. THIS WAS 2 NEW VALVES IN SUCCESSION TO FAIL.