Narrative:

Captain was hand-flying visual to runway 24; right-hand traffic; using 'snowflake' guidance from the FMS because there was not any other electronic guidance available. There were several GA aircraft in the pattern. We were told that we would be number two following a citation. We had visual contact and separation from the citation and we were cleared to land on runway 24. There were at least GA aircraft making left-traffic and a caravan behind us. A beechcraft; was making left-hand traffic and told to extend his downwind to follow the rj. Apparently; he told the controller that he thought the citation was the rj. He quickly turned base and final. This put him on a collision course with us. On TCAS; we observed the beechcraft on downwind and expected him to comply with ATC's instructions. We were in the final stages of the visual approach below 1000 ft AGL when we received a TCAS warning; promptly followed with a 'don't descend' RA. When we received the warning; I stretched to look over the nose for traffic and saw the [beechcraft] just below our nose and intercepting the final approach course. I noted his position and the captain called for a go-around. The go-around call was coincident with the 'don't descend' RA. We executed a successful go-around and returned for a safe landing. After landing; the tower began to ask us questions about the incident. He said that he was also going to file a report.

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Original NASA ASRS Text

Title: CRJ flight crew reported a General Aviation aircraft turned early; resulting in a TCAS RA and subsequent go-around.

Narrative: Captain was hand-flying visual to runway 24; right-hand traffic; using 'Snowflake' guidance from the FMS because there was not any other electronic guidance available. There were several GA aircraft in the pattern. We were told that we would be number two following a Citation. We had visual contact and separation from the Citation and we were cleared to land on runway 24. There were at least GA aircraft making left-traffic and a Caravan behind us. A Beechcraft; was making left-hand traffic and told to extend his downwind to follow the RJ. Apparently; he told the controller that he thought the Citation was the RJ. He quickly turned base and final. This put him on a collision course with us. On TCAS; we observed the Beechcraft on downwind and expected him to comply with ATC's instructions. We were in the final stages of the visual approach below 1000 ft AGL when we received a TCAS warning; promptly followed with a 'Don't Descend' RA. When we received the warning; I stretched to look over the nose for traffic and saw the [Beechcraft] just below our nose and intercepting the final approach course. I noted his position and the Captain called for a go-around. The go-around call was coincident with the 'Don't Descend' RA. We executed a successful go-around and returned for a safe landing. After landing; the tower began to ask us questions about the incident. He said that he was also going to file a report.

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.