As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT GENERATOR FELL OFF LINE - RTB MX IN PROGRESS. BITE CHECKED BPCU/ FAULT LT GEN. GCU CODE 54 AP-720614. INSPECTED WIRE AST P37 PNL AND IDG. RT & LT GCU BPCU IAW AMM. RAN ENG PLACED LOAD ON GEN OPS CHK NORMAL. VOLTS FREQS OK. ACFT OK FOR SERVICE. ETOPS CATEGORY 'E': PROBLEMS WITH SYSTEMS CRITICAL TO ETOPS.