As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
#1 AFT FUEL PUMP DOES NOT ILLUMINATE TO LOW PRESSURE WHEN SELECTED TO OFF POSITION VERIFIED ANNUNCIATOR DOES PRESS TO TEST OK ONLY OCCURRED IN FLIGHT UPON SHUTDOWN ANNUNCIATOR APPEARS TO FUNCTION NORMALLY. GROUNDED - YES. REMOVED AND REPLACED #1 AFT FUEL PUMP PRESSURE SWITCH IAW B737-800 AMM 28-42-11 OPS AND LEAK CHECK GOOD.