As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER RT ENG START GEN DID NOT COME ON LINE, SELECTED GEN OFF-ON, NO HELP. BIT BPCU HAD FAULT LT GCU REPLACED, WOULD NOT RESET. RESET BREAKER STILL WOULD NOT CLEAR. REPLACED LT GCU IAW MM 24-22-02. TESTED ALL GCU NO FAULTS. RAN ENGS ALL CONFIGS ASSOCIATED GEN PICKED UP LOAD, AFTER RUNS BPCU CLEAN, NO FAULTS.