AN MD80 ON CLBOUT AFTER TKOF DECLARED AN EMER DUE TO INABILITY TO PWR THE L AC BUS WITH THE L GENERATOR OR THE APU GENERATOR. PWR TRANSFERRED FROM THE R BUS AFTER THE APU WAS SHUT DOWN.

Narrative

MULTIPLE ELECTRICAL FAILURE: PASSING THROUGH 10000 FT MSL; THE L GENERATOR TRIPPED OFF LINE. THE L AC BUS OFF AND L GENERATOR LIGHT ILLUMINATED. I RAN THE ABNORMAL GENERATOR FAILURE CHKLIST. I STARTED THE APU WITH A NORMAL START TAKING PLACE. HOWEVER; THE APU GENERATOR SHOWED NO VOLTS AND NO FREQS. THE GENERATOR SWITCH WAS RESET WITH STILL NO VOLTS AND FREQS. NOW THE DC BUS OFF LIGHT ILLUMINATED WITH THE AUTOPLT AND AUTOTHROTTLES SHUTTING OFF. THE CAPT'S ADI ROLLED AND VARIOUS OTHER CAUTION LIGHTS ILLUMINATED. THE APU WAS THEN SHUT DOWN WITH THE APU FIRE SWITCH. THE ELECTRICAL SYS RETURNED TO A NORMAL SINGLE GENERATOR OP. THE AUTOPLT AND AUTOTHROTTLES WERE THEN RE-ENGAGED. AN EMER WAS DECLARED AND WE RETURNED TO CLT BECAUSE OF THE SINGLE GENERATOR OP. THE LNDG WAS UNEVENTFUL EXCEPT IT WAS AN OVERWT LNDG. A LOGBOOK WRITE-UP WAS MADE BECAUSE OF THE OVERWT LNDG. AFTER PARKING MAINT FOUND THAT BOTH THE #1 AND #3 GCU'S HAD TRIPPED IN THE E&E COMPARTMENT. AS FAR AS WHY THEY BOTH TRIPPED DURING THE SAME FLT/TIME WE HAVE NO IDEA. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THAT AFTER THE APU WAS STARTED AND THE APU GENERATOR FAILED TO PWR THE L BUS IT WAS IMMEDIATELY SHUT DOWN AND ONLY THEN DID THE R GENERATOR PWR THE L BUS. THE RPTR SAID THE L BUS DC PWR WAS ALSO LOST WITH NO TRANSFER TO BATTERY PWR. THE RPTR STATED WHEN ON THE GND A MECH RESET THE #1 GENERATOR CTL UNIT AND THE APU CTL UNIT AND WAS GOING TO SIGN OFF THE RPT AND DISPATCH THE TRIP. THE RPTR SAID THE CAPT AND THE RPTR WERE NOT SATISFIED WITH THIS MAINT ACTION DUE TO THE MULTIPLE ELECTRICAL PROBS AND LOSS OF DC PWR AND REQUESTED A PLANE CHANGE. THE RPTR ALSO STATED THAT NO DETAILS WERE AVAILABLE FROM MAINT AS TO THE FINAL FIX.