As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON AN OPS CHECK FLIGHT, PILOT REPORTED LOW PRESSURE FUEL LIGHT ON THE NR 1 ENG, LIGHT WENT OUT WITH AUX PUMP ON. REPLACED PUMP. TEARDOWN OF REMOVED PUMP REVEALED THAT THE PRESSURE CONTROL DIAPHRAGM HAD FAILED POSSIBLY DUE TO AN IMPROPERLY MFG PN RA5361 SPRING PLATE WITH EDGE RADIUS NOT IN CONFORMANCE WITH MFG DRAWING.