As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BOI - ON CLIMBOUT AT 18000 FEET, THE LEFT TRANSFER SHUTOFF VALVE MESSAGE ILLUMINATED. CENTER FUEL TANK QUANTITY INCREASED WITH FUEL BURN. CREW COMPLIED WITH EMERGENCY PROCEDURES AND THE AIRCRAFT RETURNED TO FIELD. MAINTENANCE INSPECTED THE AIRCRAFT AND REPLACED THE LEFT FUEL TRANSFER SHUTOFF VALVE CARTRIDGE. TRANSFER SYSTEM, FQGC AND VALVE SYSTEM TESTS WERE COMPLIED WITH. OPERATIONAL CHECKS WERE GOOD, AN RII WAS COMPLIED WITH AND THE AIRCRAFT WAS RETURNED TO SERVICE.