E145 FLT CREW EXPERIENCES MULTIPLE ELECTRICAL SYSTEM ANOMALIES UPON SHUTTING DOWN ONE ENGINE AND STARTING THE APU FOLLOWING LNDG.

Narrative

WE FLEW FROM ZZZ1 TO ZZZ. AFTER LNDG; AS WE TAXIED TOWARDS THE GATE; WE SHUT DOWN THE #2 ENG AND STARTED THE APU. THEN WE GOT A HUGE ELECTRICAL GLITCH. THE AIRPLANE ENTERED THE 'ELECTRICAL EMER MODE' AND THE 'LOSS OF ALL GENERATORS MODE.' WE LOST MANY AIRPLANE SYS; INCLUDING STEERING; EICAS INDICATIONS; AHRS; DC BUSSES; AND LOTS OF OTHER SYS. BASICALLY; THE ONLY THINGS THAT WORKED WERE THE ENG AND 1 RADIO. WE THEN SHUT THE AIRPLANE DOWN TWICE AND RESTARTED IT. AFTER THE SECOND RESTART; THE AIRPLANE RETURNED TO THE NORMAL ELECTRICAL CONFIGN; ALTHOUGH WE STILL HAD MANY SYS MISSING. BUT WE GOT THE STEERING/HYDS BACK AND WERE ABLE TO TAXI IN TO THE GATE. WE COORD ALL OUR ACTIONS WITH ATC AND FOR A TIME I THINK WE WERE DECLARED 'A DISABLED ACFT ON THE TXWY.' AT THE GATE; WE SHUT THE AIRPLANE DOWN AGAIN; AND RESTARTED IT. AT THIS POINT; EVERYTHING RETURNED TO NORMAL. WE DID ALL OF OUR COCKPIT CHKS; INCLUDING FIRST FLT ITEMS AND A THOROUGH PREFLT. EVERYTHING WAS NORMAL. I DISCUSSED THIS EVENT WITH DISPATCH AND MAINT CTL AND WE ALL CONCURRED THAT THE AIRPLANE WAS SAFE TO FLY. WE THEN LOADED UP PAX AND RETURNED TO ZZZ1 UNEVENTFULLY.