As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 1508 SAN-PHL - DIVERSION/IFSD - FUEL SYSTEM BURNED FUEL ONLY FROM LT MAIN TANK. THE CAPTAIN REPORTED, UNABLE TO STOP THE TRANSFER. IMBALANCE STOPPED AT 6000 LBS WHEN THE ENGINE WAS SHUT DOWN. THE ACFT DIVERTED TO PHX AND LANDED WITHOUT INCIDENT. MAINTENANCE REMOVED AND REPLACED THE OVERPRESSURE PROTECTOR. (S)