As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FUEL CENTER TANK PUMP #2 LOW PRESSURE/FAULTY. ACCOMPLISHED FUNCTIONAL CHECK OF CENTER TANK PUMP 2 PER TSM 28-21-00. NO FAULTS NOTED. TROUBLESHOOT FAULTY GFI (70QA) IT WILL NOT TEST. REPLACED GFI PER AMM 28-18-00. AIRCRAFT WAS GROUNDED.