As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ACCOMPLISHMENT OF NG-28FCD-18088-1, FQIS NR 1 TANK AND COMP UNITS TESTING, FOUND TU'S F4 AND F6 OUT OF LIMITS. ACFT GROUNDED. REMOVED AND REPLACED TANK 1 F4 AND F6 TANK UNIT PROBES IAW AMM 28-41-21-400-801. ACCOMPLISHED FQIS SYSTEM TEST IAW AMM 28-41-00 TEST GOOD.