A MD80 EXPERIENCED SMOKE IN THE CABIN WHILE TAXIING. AIRPLANE STOPPED AND EVACED.

Narrative

AFTER START OF TAXI ON TXWY 'B' COCKPIT CREW NOTICED AN ODOR IN COCKPIT -- CAPT ASKED ME IF I SMELLED ANYTHING -- ODOR BECAME STRONGER AND WAS EVIDENT IT WAS SMOKE. ABOUT THIS TIME; FLT ATTENDANT CALLED THE COCKPIT AND WHILE THE CAPT WAS TALKING TO THE FLT ATTENDANT I HEARD PAX YELLING 'SMOKE' AND 'STOP.' CAPT TOLD ME TO TELL GND WE WERE STOPPING AND IMMEDIATELY STOPPED AND OPENED THE COCKPIT DOOR. A THICK BLUISH SMOKE WAS IN THE CABIN WITH VISIBILITY INSIDE RESTR TO ROW 18 OR SO (ABOUT 1/2 WAY). I TOLD GND CTL WE'RE STOPPING THE ACFT AND ROLL THE EMER EQUIP. I REACHED UP AND TURNED OFF THE AIR-CONDITIONING PACKS AND CLOSED THE BLEED VALVES. SMOKE WAS STILL PRESENT AND CAPT CALLED THE EVAC CHKLIST AND CALLED FOR AN EVAC ACFT FORWARD -- (ALL 45 PAX WERE SEATED AHEAD OF EMER EXIT ROWS; WINGS; FOR WT AND BAL). AFTER COMPLETING EVAC CHKLIST I NOTICED 2-3 PAX OUTSIDE WALKING VERY FAST TOWARD 4L THE ACTIVE DEP RWY. I TOLD THE CAPT I WAS LEAVING TO 'ROUND-UP' THE PAX. AFTER DEPLANING; I NOTICED PORT AUTH HAD PARKED A 'STAIR' TRUCK BY THE FORWARD R DOOR AND DOOR WAS NOT OPENED; NOR SLIDE DEPLOYED -- ALL PAX NOW ALL OUT OF DOOR 1L. LATER; I FOUND THAT THE R FORWARD GALLEY SVC DOOR HAD BEEN BLOCKED BY THE TRUCK. IN THE END; I FEEL THE ASSESSMENT OF THE SIT AND ACTION TAKEN WERE APPROPRIATE AND DONE 'BY THE BOOK.' THE ONLY PROB WAS THE BLOCKED DOOR WHICH COULD HAVE BEEN DISASTROUS IF FIRE WAS PRESENT AND MORE PAX HAD TO BE EVACED. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR WAS CONTACTED AND REVEALED THE FOLLOWING DETAILS. THE ACFT WAS A MD80 AND THE SMOKE WAS CAUSED BY HYD FLUID LEAKING ON THE APU AND INGESTING THE FUMES AND VAPOR INTO THE AIR-CONDITIONING PACKS. ALL THE EMER EQUIP THAT WAS USED WORKED NORMALLY EXCEPT THE FORWARD R DOOR. DURING THE EVAC A CABIN ATTENDANT ATTEMPTED TO OPEN THE FORWARD R DOOR AND DEPLOY THE EVAC SLIDE BUT FOUND THE DOOR BLOCKED BY AN EMER VEHICLE. THE RPTR BELIEVES IT IS ARPT EMER PROCS TO POS ENTRANCE STAND TRUCK TO THE EVACING ACFT. THE RPTR STATES THAT NO CONTACT WAS MADE BY THE FAA.