As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SCREW THAT SECURES NEEDLE VALVE TO DIAPHRAGM IN FUEL PRESSURIZATION VALVE CAME LOOSE ALLOWING NEEDLE VALVE TO COME LOOSE WHICH SHUT ENGINE DOWN. SCREW STILL HAD EVIDENCE OF LOC-TITE ON THREADS. SUSPECT THAT FUEL MAY HAVE SOFTENED LOC-TITE WHICH ALLOWED SCREW TO BACK OUT.