As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 2 AFT LOW PRESSURE LIGHT ILLUMINATED. GROUNDED-YES. WITH A/C POWER UP AT REMOTE LOCATION, PERFORMED B737-800 FIM 28-22 TASK 805. TANK 2 AFT PUMP & ASSOCIATED LOW PRESSURE LIGHT OPERATIONS NORMAL NUMEROUS TIMES, PER FIM INTERMITTENT FAULT. SUSPECT A FAILING NR 2 AFT BOOST PUMP LOW PRESSURE SWITCH. REMOVED AND REPLACED NR 2 RIGHT AFT BOOST PUMP LOW PRESSURE SWITCH, REF B737-800 AMM 28-42-11. OPERATIONS CHECK GOOD.