As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: LEFT AFT FUEL PUMP DOES NOT SHOW OFF WHEN TURNED OFF. BULB IS WORKING AND PUMP TURNED OFF FOR FUEL BALANCING ENROUTE. REMOVED AND REPLACED LEFT HAND AFT BOOST PUMP PRESSURE SWITCH, OPERTIONAL CHECK GOOD. PER AMM 28-42-11-401.