As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STL - INFLIGHT ORD-DFW. CREW REPORTED LEFT FUEL PUMP INOPERATIVE INDICATION AND FUEL IMBALANCE. EMERGENCY DECLARED DIVERTED STL LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED BOTH THE LEFT AFT AND LEFT FORWARD FUEL BOOST PUMPS. SYSTEM GROUND CHECKED NORMAL OPERATION.