What was found
A FACTORY OVERHAULED ENGINE WAS BEING INSTALLED WHEN MECH REPORTED UNABLE TO CONNECT THE FUEL LINES TO THE NEW FUEL PUMP (ENG DRIVEN). THE 'IN' AND 'OUT' PORTS WERE REVERSED. MFG WAS CONTACTED, AND A SECOND PUMP SENT, BUT IT WAS THE SAME P/N AS THE ORIG, BUT THE BOX HAD ANOTHER P/N ON IT. A 3RD PUMP REC'D WITH PN 2W16775 WHICH WAS THE CORRECT PART. THE ACFT PARTS MANUAL SHOWS TWO DIFFERENT FUEL SYSTEMS FOR ACFT SN 0001-0890 AND SN 0890 AND ON. THE FRIST TWO PUMPS WOULD HAVE FIT EARLY SERIAL NUMBERED ACFT.