As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RT MAIN FUEL TANK GAUGE LOST 400 LBS ON ITS INDICATION AND THE FUEL TOTALIZER ALSO SHOWED THIS 400 LB LOSS. ACFT GROUNDED. REF TSR814939 AND TANK ENTRY T/C NR 78528000. R & R NR 2 TANK COMPENSATOR UNIT REF MM 28-41-21-400-801. PERFORMED SYS TEST REF MM 28-41-00-730-801 AND OPS TEST - FUEL QTY INDICATING SYS REF MM 28-41-00-710-801. OPS TESTS NORMAL.