What was found
# 1 MAIN TANK FUEL QUANTITY FAILS SYSTEM TEST PER AMM 28-41-00-730-801. PROBES #1, #2, AND #7 OUT OF ACCEPTABLE VALUES. GROUNDED - YES. INITATED MIG-2C S/N 40-0022500, FOR INSPECTION REQUIREMENTS, POWER DEACTIVATION, AND LEAK CHECKS REF TASK CARD # 78528000 - LINE TANK PURGING AND ENTRY. REMOVED AND REPLACED TANK UNITS #1, #2, AND #7 REF B737-800 AMM 28-41-21/400 #1 FQIS SYSTEM TEST NOW CHECKS GOOD REF AMM 28-41-00/501 AT 396.3 PICO FERADS. MIG 2C S/N 40-0022500 ALL ITEMS COMPLETE.