As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF #1 MAIN FUEL TANK AFT PUMP LOW PRESSURE LIGHT ILLUMINATED. GROUNDED - YES. INSPECTED AND TROUBLESHOOT IAW B737-800 FIM 28-22 TASK 814. REMOVED AND REPLACED #1 MAIN TANK AFT BOOST PUMP AND OPS CHECK IAW B737-800 AMM 28-22-14. NORMAL INDICATION RESTORED. GROUND VERIFICATION GOOD. SEAMC SCOTT NOTIFIED. ACFT OK FOR SERVICE.TSAR174M.