What was found
ON FINAL TO KSBD LOST THE LEFT AC BUS. WE HAD L GEN OFF, L BUS OFF, AND L BUS TIE TO ISLN ON THE OVERHEAD PANEL. LOST ASSOCIATED EQUIPMENT ON CAPTAIN SIDE. FLAPS AT 20 DEGREES. WENT AROUND AND RAN THE AC BUS OFF CHECKLIST. WE WE ABLE TO GET THE LEFT BUS BACK BUT NEVER RECOVERED THE LEFT GENERATOR. COORDINATED WITH GOC AND MOCC TO DIVERT TO KONT. RELEASED FOR SERVICE . BASED ON PDIS LIST OF FAILURES, SUSPECT L ENG GCU. R & R L ENG GCU. OPS CK OK.