As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEVERAL (13) MANIFOLD FUEL PRESSURE GAUGES HAVE BEEN FOUND BY THE AIRCREW TO BE SLOW TO RESPOND. INST. WAS SENT TO UNITED INST. FOR REPAIR. UNITED INSTS. SAID HEY FOUND THE ADJUSTMENT SCREW HAD BEEN MOVED. INSTS. WERE INSTALLED ON AIRCRAFT IN PRODUCTION.