As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PRIOR TO DESCENT, L AFT FUEL PUMP EICAS MESSAGE AND PRESS LIGHT IN L AFT PUMP SWITCH. COMPLIED WITH QRH PROCEDURE. WHILE DEBRIEFING CREW, FOUND "L AFT FUEL BOOST PUMP" CIRCUIT BREAKER TRIPPED. COLLARED CB PER MEL. A/C OK FOR SERVICE. TROUBLESHOT PER FIM WITH NO DEFECTS NOTED. FIM DETERMIND THAT CONDITON THAT CAUSED CIRCUIT BREAKER TO OPEN IS NOT PRESENT. AC OK TO CONTINUE