As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 2 GEN DISCONNECTED FROM BUS WOULD NOT RESET, VOLTS AND FREQS NORMAL, DIVERTED JFK. FOUND PIN 55 ON B1A GCU RACK CONNECTOR PUSHED BACK AND FOUND PIN 43 ON J1B SHORTED TO GROUND. REPLACED NR 2 GCU RACK HARNESS, RAN ENGINES AND ALL CHECKS GOOD.