Narrative:

Normal taxi with bleeds on (after propellers out of feather for 1 min). Taxi from horseshoe to runway 25 via txwys bn and G. Taxi checklist completed on taxiway bn wbound. Taxiing south on taxiway G, captain called for 'before takeoff check to the line' and the checklist was completed. A blue caution alerting system message 'left pack inoperative' appeared. Captain selected environment control system page while first officer selected the left environment control system from 'manual' to 'automatic' mode. Captain suggested resetting the left pack to attempt to clear the blue caution alerting system message. The first officer turned the left pack off, and xbleed on (2 bleeds feeding right pack). On the environment control system page, and then on the caution alerting system field, amber 'left pack fail/overheat' messages appeared. The flight attendant then called on the interphone and reported smoke in the cabin. No smoke was detected in the cockpit at this time. Captain asked if evacuate/evacuation was needed. The captain stopped the aircraft and set the parking brake. The cockpit door was opened for the crew to assess the situation. The captain and first officer viewed a white haze in the passenger cabin. First officer suggested that the haze might be condensation vapor from the air conditioning. After a moment of evaluation, the captain and first officer began to smell the haze and determined it was not condensation vapor. The captain advised the flight attendant to plan an evacuate/evacuation out the main cabin door. The first officer advised ATC of smoke in the cabin and evacuate/evacuation plane. Captain executed the 'emergency evacuate/evacuation' memory items. Once the left engine and propeller was secure, flight attendant opened main cabin door and directed the passenger off the aircraft, while the captain called 'evacuate/evacuation left' on the PA. The first officer completed the 'emergency evacuate/evacuation' checklist. Captain directed first officer to deplane and to account for the passenger. Captain exited last with flashlight after turning the batteries off per checklist.

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Original NASA ASRS Text

Title: A DORNIER 328 ON TAXI OUT DECLARED AN EMER AND EVACED THE ACFT DUE TO SMOKE AND FUMES CAUSED BY AN AIR CYCLE MACHINE BEARING FAILURE.

Narrative: NORMAL TAXI WITH BLEEDS ON (AFTER PROPS OUT OF FEATHER FOR 1 MIN). TAXI FROM HORSESHOE TO RWY 25 VIA TXWYS BN AND G. TAXI CHKLIST COMPLETED ON TXWY BN WBOUND. TAXIING S ON TXWY G, CAPT CALLED FOR 'BEFORE TKOF CHK TO THE LINE' AND THE CHKLIST WAS COMPLETED. A BLUE CAUTION ALERTING SYS MESSAGE 'L PACK INOP' APPEARED. CAPT SELECTED ENVIRONMENT CTL SYS PAGE WHILE FO SELECTED THE L ENVIRONMENT CTL SYS FROM 'MANUAL' TO 'AUTO' MODE. CAPT SUGGESTED RESETTING THE L PACK TO ATTEMPT TO CLR THE BLUE CAUTION ALERTING SYS MESSAGE. THE FO TURNED THE L PACK OFF, AND XBLEED ON (2 BLEEDS FEEDING R PACK). ON THE ENVIRONMENT CTL SYS PAGE, AND THEN ON THE CAUTION ALERTING SYS FIELD, AMBER 'L PACK FAIL/OVERHEAT' MESSAGES APPEARED. THE FLT ATTENDANT THEN CALLED ON THE INTERPHONE AND RPTED SMOKE IN THE CABIN. NO SMOKE WAS DETECTED IN THE COCKPIT AT THIS TIME. CAPT ASKED IF EVAC WAS NEEDED. THE CAPT STOPPED THE ACFT AND SET THE PARKING BRAKE. THE COCKPIT DOOR WAS OPENED FOR THE CREW TO ASSESS THE SIT. THE CAPT AND FO VIEWED A WHITE HAZE IN THE PAX CABIN. FO SUGGESTED THAT THE HAZE MIGHT BE CONDENSATION VAPOR FROM THE AIR CONDITIONING. AFTER A MOMENT OF EVALUATION, THE CAPT AND FO BEGAN TO SMELL THE HAZE AND DETERMINED IT WAS NOT CONDENSATION VAPOR. THE CAPT ADVISED THE FLT ATTENDANT TO PLAN AN EVAC OUT THE MAIN CABIN DOOR. THE FO ADVISED ATC OF SMOKE IN THE CABIN AND EVAC PLANE. CAPT EXECUTED THE 'EMER EVAC' MEMORY ITEMS. ONCE THE L ENG AND PROP WAS SECURE, FLT ATTENDANT OPENED MAIN CABIN DOOR AND DIRECTED THE PAX OFF THE ACFT, WHILE THE CAPT CALLED 'EVAC L' ON THE PA. THE FO COMPLETED THE 'EMER EVAC' CHKLIST. CAPT DIRECTED FO TO DEPLANE AND TO ACCOUNT FOR THE PAX. CAPT EXITED LAST WITH FLASHLIGHT AFTER TURNING THE BATTERIES OFF PER CHKLIST.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.