As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING PREINSPECTION RUN, IT WAS NOTED THAT THE ENGINE DRIVEN FUEL PUMP PRESSURE WAS LOW AFTER ADJUSTMENTS WERE MADE THE DESIRED PRESSURE SETTING WAS NOT OBTAINABLE. TROUBLESHOOTING, IT APPEARS THE RELIEF VALVE IS HUNG UP PUMP WAS REMOVED FROM SERVICE AND SENT OUT FOR REPAIR.