As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PHX - INFLIGHT DFW-ONT. CREW REPORTED CENTER TANK FUEL TRANSFERS VERY SLOWLY. FLIGHT DIVERTED PHX LANDED WITHOUT INCIDENT. PLACARD BOTH CENTER FUEL TANK BOOST PUMPS INOPERATIVE. REPLACED BOTH CENTER FUEL TANK BOOST PUMPS AT LAX ON 04/29/2011. SYSTEM GROUND CHECK NORMAL OPERATION.