As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI OUT R AFT FUEL PUMP EICAS MESSAGE APPEARED ,A/C RETURNED TO GATE AND MTX GROUNDED AC MTX THEN PERFORMED RH AFT PUMP OPERATIONAL TEST PER ABX-B767 AMM 28-22-00 NO FAULTS FOUND .AC REMAINS NO ETOPS . AND RETURNED A/C TO SERVICE.