Narrative:

We were in the process of boarding; and the aircraft shut off; the captain said the ground power got disconnected. So we turned the aircraft back on and the captain had informed us he will make an announcement that we have to shut the aircraft down again. So after we did that; maintenance was called out and at this point we were done boarding. I; [the other flight attendant]; and the gate agent were in the forward part of the aircraft when all three of us heard this loud noise coming from the aircraft. It was so loud everyone heard it and started looking out of the windows. When I looked out of the main cabin door we noticed there was smoke coming from below the airplane and it had a horrible smoke smell; and it quickly filled the cabin. I immediately went into the flight deck and told the captain; first officer; and the maintenance man and all three quickly went running down. The captain came back and said to deplane the aircraft. The captain also told us to have the passengers leave their stuff and get off quickly. So we did that and shortly after we got cleared for the passengers to come back in groups to get their belongings; and we moved to a new gate.

Google
 

Original NASA ASRS Text

Title: EMB-175 Flight Attendant reported everyone evacuated the aircraft after the cabin filled with smoke during the boarding process.

Narrative: We were in the process of boarding; and the aircraft shut off; the Captain said the ground power got disconnected. So we turned the aircraft back on and the Captain had informed us he will make an announcement that we have to shut the aircraft down again. So after we did that; Maintenance was called out and at this point we were done boarding. I; [the other flight attendant]; and the gate agent were in the forward part of the aircraft when all three of us heard this loud noise coming from the aircraft. It was so loud everyone heard it and started looking out of the windows. When I looked out of the main cabin door we noticed there was smoke coming from below the airplane and it had a horrible smoke smell; and it quickly filled the cabin. I immediately went into the flight deck and told the Captain; FO; and the Maintenance man and all three quickly went running down. The Captain came back and said to deplane the aircraft. The Captain also told us to have the passengers leave their stuff and get off quickly. So we did that and shortly after we got cleared for the passengers to come back in groups to get their belongings; and we moved to a new gate.

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.