UNABLE TO DEPLANE PAX WITHOUT USING SLIDES AFTER AN EMER LNDG.

Narrative

#3 GENERATOR STARTED TO FAIL; AND THEN THE #1 GENERATOR FAILED COMPLETELY. THE APU GENERATOR WAS STARTED AND BROUGHT ON LINE. THEN THE #2 AND #3 GENERATORS BEGAN TO LOSE CYCLES. THE #3 GENERATOR WAS ISOLATED; AND THE #2 GENERATOR CAME BACK TO SPD WHILE THE #3 GENERATOR CONTINUED TO DECAY. THEN THE APU GENERATOR FAILED. AT THIS POINT; THE APU GENERATOR HAD FAILED; THE #1 GENERATOR WAS FAILED; THE #2 WAS WORKING AND THE #3 WAS FAILING. AT THIS POINT WE DECLARED AN EMER AND DIVERTED TO THE NEAREST VFR ARPT -- PITTSBURGH. AT THIS STAGE; SO MANY COMPONENTS OF THE ELECTRICAL SYS HAD FAILED; THAT WE WERE NOT SURE WHAT WOULD FAIL NEXT. IT WAS OUR OPINION THAT WE GET THE ACFT ON THE GND AS SOON AS POSSIBLE. SUPPLEMENTAL INFO FROM ACN 204691: WE LANDED AT PIT. THE PAX WERE BRIEFED. WE HAD A GOOD CABIN TEAM AND THE PEOPLE IN THE BACK BEHAVED WELL. AFTER LNDG; THE FO SMELLED SMOKE. I SAW A SMALL AMOUNT BEHIND MY PANEL. AT THE TIME WE WERE OFF THE RWY ON THE TAXIWAY. THE CAPT STOPPED THE ACFT AND COMMANDED WE SHUT DOWN EVERYTHING. WE HAD NO WAY TO HEAT OR COOL THE CABIN. THE PAX WERE CALM; BUT FOR THEIR SAFETY; WE WANTED THEM OFF THE AIRPLANE. GND CTL DELAYED THE BUSES AND TUGS TRYING TO GET TO US. THE PEOPLE WERE ON THE AIRPLANE 50 MINS BEFORE DEPLANING TO BUSES VIA MOBILE AIRSTAIRS. ALSO WE HAD NO COMMON RADIO FREQ TO TALK TO THE VERY PROFESSIONAL FIRE DEPT AT PIT. FINALLY WE OPENED THE R DOOR (LOSING ITS USE AS AN EVAC SLIDE) WITH MANUAL SPRINGS SO WE COULD TALK TO THE FIRE TRUCKS AND BROUGHT 3 OR 4 FIREMEN UP IN SUITS WITH FIRE EXTINGUISHERS; AND; GOD BLESS THEM; A HAND HELD RADIO. USUALLY; AN ACFT IN TROUBLE EITHER LANDS OK AND TAXIES TO ITS GATE; OR THEY EVAC THE AIRPLANE. THINGS THE 'SYS' HAS PLANS FOR AND TRAINS FOR; BUT THERE SEEMS TO BE NO PLAN FOR THE MIDDLE GND. AN AIRPLANE THAT'S IN TROUBLE AND LANDS BUT CAN'T TAXI TO ITS GATE; BUT IT ISN'T BAD ENOUGH TO EVAC. I THINK ARPT SHOULD HAVE AIRSTAIRS AVAILABLE AND MAYBE US THE TERMINAL SHUTTLE BUS TO REMOVE THE PAX BEFORE THEY ARE HURT GOING DOWN THE SLIDES. AND HAVE A PLAN TO HAVE THEM READY SO AS TO REDUCE THE TIME GETTING PEOPLE OUT OF THE AIRPLANES.