As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN TURB LT GEN OFF EICAS AND LT GEN CONT OFF LIGHTS ILLUM. ATTEMPTED QRH RESET, UNSUCCESSFUL. PERF BCPU BITE TEST RT GCU FAULT. R&R RT GCU PER 24-22-02. RAN BOTH ENGINES TO TEST 1+2 IDG PER 24-11-00. BOTH IDG 1+2 OPS OK. NO FAULTS NOTED ON BPCU. OK FOR SERVICE.