As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE ACCOMPLISHING T/C NG-28FCD-18090-1, FOUND #2 MAIN TANK FUEL TANK TOTAL TANK CAPACITANCE AND COMPENSATOR CAPACITANCE OUT OF LIMITS. GROUNDED. MIG-2C INITIATED. REMOVED AND REPLACED #2 TANK COMPENSATOR PROBE AND TANK UNITS F1,F3,F8 AND F9 IAW B737-800 AMM 28-41-21. OPS CHECK NORMAL. DEFECT CLEARED.