As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RT AC BUS OFF EICAS MSG COM QRH AND MESSAGE WAS CLEARED. PERFORMED BPCU BIT, IAW 24-22-02. NO FAULTS FOUND. PERFORMED FIM 24-20 FT 801 THROUGH STEP 11. RT GEN CONTROL UNIT R & R, IAW 24-22-02 AND PERFORMED TEST OF GCU AND BPCU, IAW 24-22-02. OPS CHK GOOD. T/S ACCOMPLISHED, IAW 24-20 TASK 804 TABLE 102.