As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT NOT GROUNDED: FLIGHT RETURNED TO DFW ON ACCOUNT OF LEFT FUEL PUMP FAILURE. DUMPING FUEL TO AVOID OVERWEIGHT LANDING. MAINTENANCE ACCOMPLISHED FIM TASK 28-22-00-810-831, FOUND TO BE AN INTERMITTENT FAULT IAW FIM 28-22-00-810-831. REPLACED LEFT FWD BOOST PUMP SWITCH IAW 28-42-01. *** SUPPLEMENTAL INFORMATION: ADDED DUMP FUEL TO PRECAUTIONARY PROCEDURES*** (CLOSED)