As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RTF LAX, FUEL TANK AND TOTAL FUEL QTY IND INOP-IND BLANK- FUEL QTY IND EICAS MSG DISPLAYED- POSITION 1 (LEFT). *S/D* THE IN-TANK FQIS WIRING HARNESS AND ALL TANK UNITS WERE REPLACED 24 FEB AND THE FQIS HAS FUNCTIONED PROPERLY SINCE. THE REMOVED WIRING HARNESS IS AT INDEG FOR EVALUATION AND AWAITING SHOP FINDINGS FOR THE REMOVED TANK UNITS FROM PC153.