As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
#1 AFT MAIN FUEL PUMP LOW PRESSURE LIGHT ILLUMINATED. GROUNDED - YES. TROUBLESHOT PER B737-800 FIM 28-22 TASK 803 INSPECTED AFT BOOST PUMP, C/B, GFI RELAY FOUND NO DEFECTS. RAN BOOST PUMP FOR 20 MIN ON GROUND LOW PRESSURE LIGHT DID NOT ILLUMINATE. FOUND TO BE AN INTERMITTENT FAULT GROUND VERIFICATION GOOD.