As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
T-R UNIT EICAS STATUS MSG ALONG WITH 6 OTHER STATUS MSGS. FOUND LEFT TRU CIRCUIT BREAKER POPPED ON THE P31 LEFT GENERATOR POWER PANEL. REPLACED LEFT TRU REF. MM 24-32-01. RESET LEFT TRU CIRCUIT BREAKER. LEFT TRU GROUND CHECKS GOOD REF. MM 24-32-01 AND FIM 24-32-00. ROTABLE PARTS CHANGE WAS INDICATED - TT # 1716829 SN OFF 5588 TRANSFORMER, RE OFF 99-2432-9-0003 5588 ON 99-2432-9-0003 6104 ALL EICAS MESSAGES WERE CLEARED.