As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EICAS MSG L GEN OFF DISPLAYED. GEN OFF LIGHT ILLUM. OPERATED NORM AFTER RESET. CREW COMMENTS: RESET OKAY. REPLACED BPCU. SWAPPED NR 2 AND APU GCU'S PRECAUTIONARY. RAN BOTH ENGINES, BOTH ENGINES AUTO R TRANSFER FROM APU AND BACK TO APU ON ENGINE SHUT DOWN. SYSTEMS BITE CHECK OK.