Narrative:

10 mins prior to pushback, white dense smoke in cabin. Evacuate/evacuationed people out of doors 1L and 2L. Suspect APU. Shut APU down via evacuate/evacuation checklist and smoke cleared. No injuries or damage. Deployed 1 slide at door 2L.

Google
 

Original NASA ASRS Text

Title: A320 WAS EVACED DURING BOARDING, WHILE ACFT WAS PARKED AT THE GATE. DENSE, WHITE SMOKE IN CABIN CLRED WHEN SUSPECT APU WAS SHUT DOWN.

Narrative: 10 MINS PRIOR TO PUSHBACK, WHITE DENSE SMOKE IN CABIN. EVACED PEOPLE OUT OF DOORS 1L AND 2L. SUSPECT APU. SHUT APU DOWN VIA EVAC CHKLIST AND SMOKE CLRED. NO INJURIES OR DAMAGE. DEPLOYED 1 SLIDE AT DOOR 2L.

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.