What was found
#2 MAIN TANK FQIS HAS BAD BAD PROBES FOUND DURING TSR703168: COMP, F2, F4, F5 AND F6. GROUNDED - YES. REPLACED #2 MAIN TANK PROBES F4, F5, AND F6 IAW B737-800 AMM 28-41-21/401 TANK UNITS ARE WITHIN LIMITS. REMOVED AND INSTALLED COMPENSATOR AND F2 TANK UNIT ON #2 MAIN TANK PER AMM 28-41-21/401, TANK UNIT AND COMPENSATOR IN LIMITS. OPENED, COLLARD AND RESET 8 C/B'S. PLACARDS REMOVED. REVERSED CONFIGURATION CHANGE. GROUND VERIFICATION SUCCESSFUL.