Narrative:

Upon arrival at the aircraft; we noticed snow and ice on the plane. We coordinated for deicing in the gate. After all preflight procedures were accomplished; we started the ground de/anti-ice checklist and indicated we were ready for de-ice. The ground crew cleared the aircraft of snow and ice. Maintenance called on the intercom to tell us de-ice was complete and to give us the information for the [holdover times]. The first officer (first officer) started his clock upon this notification. After 3 minutes; we continued the checklist. Soon after the APU bleed was turned on; we heard the fire bell and received an ECAM warning of 'cargo comp smoke'. We looked up to see it was the aft section. Within seconds we received multiple warnings from the other main deck sections until all 3 were alarming. The smoke seemed to move forward. I asked the first officer to open the door and take a quick look. We both saw the 9g net obscured by white smoke. He shut the door. I called ground control to declare the emergency and requested fire equipment; and then called for the evacuation checklist. We accomplished the evacuation checklist but did not discharge any agent since the smoke did not smell like smoke. The first officer called out his window for the stairs; and we walked off the aircraft.

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Original NASA ASRS Text

Title: An air crew; after having been de-iced at the gate proceeded with their checklist and turned on the APU Bleed. A fire bell sounded followed by an ECAM warning of 'Cargo Comp Smoke'. They declared an emergency and evacuated the airplane. The reporter concluded that 'De-icing fluid or water was in the ducting causing vapor which the aircraft sensed as smoke.'

Narrative: Upon arrival at the aircraft; we noticed snow and ice on the plane. We coordinated for deicing in the gate. After all preflight procedures were accomplished; we started the Ground De/Anti-Ice checklist and indicated we were ready for de-ice. The ground crew cleared the aircraft of snow and ice. Maintenance called on the intercom to tell us de-ice was complete and to give us the information for the [holdover times]. The First Officer (FO) started his clock upon this notification. After 3 minutes; we continued the checklist. Soon after the APU Bleed was turned on; we heard the fire bell and received an ECAM warning of 'Cargo Comp Smoke'. We looked up to see it was the aft section. Within seconds we received multiple warnings from the other main deck sections until all 3 were alarming. The smoke seemed to move forward. I asked the FO to open the door and take a quick look. We both saw the 9g net obscured by white smoke. He shut the door. I called ground control to declare the emergency and requested fire equipment; and then called for the Evacuation checklist. We accomplished the Evacuation checklist but did not discharge any agent since the smoke did not smell like smoke. The FO called out his window for the stairs; and we walked off the aircraft.

Data retrieved from NASA's ASRS site 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.