As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENROUTE, LT GEN OFF LIGHT ILLUMINATED. BUS ISOLATED. ACARS OH DISPLAYED. SYS OPERATED NORMALLY AFTER GEN CONTROL RESET. BUS TIE RESET NOT ATTEMPTED. THE FLIGHT DECLARED AN EMERGENCY AND RETURNED TO FIELD. THE FLIGHT LANDED WITHOUT FURTHER INCIDENT. MX PLACED THE LT GENERATOR ON MEL AND RELEASED THE ACFT FOR FLIGHT. THE LT IDG FEEDER CABLE AND THE FIREWALL CONNECTOR WERE LATER REPLACED, AND CONNECTOR WAS ALSO REPINNED. ACFT OK FOR SERVICE.