Narrative:

While on position for takeoff from runway 33L in houston (iah) we were given clearance for takeoff with a left turn to a heading of 270. The first officer was performing the takeoff. While on our takeoff run we noticed that an rj came in view to our right as he made his takeoff run on runway 33R. The rj rotated only a second or two ahead of us. As we approached 400 feet and started the left turn to the assigned 270 degree heading; we noticed that the rj was not moving at all on the first office's sliding window. It was a bit confusing that the rj was not diverging away from us. It took a few seconds to release that he too was in the left turn to our right an slightly above us. We started a level off as we realized that we were both give a turn west or southwest. We level off at around 2;000 feet for we lost sight of our traffic. On the TCAS; I noticed that we came within 700 feet of each other when we the first officer pretty much leveled off. We did not descend for I saw on TCAS that the separation was increasing due to our near level off. We continued to climb when I made visual contact with the rj that looked that he was heading south bound. I asked the tower if he had given both a turn left on departure and he responded with yes. Tower controller continued to say that the rj turn was well inside of my turn. I disagreed with him and he ask me to switch over to departure control frequency. No TCAS warning was trigger in our cockpit.we believe that if we did not start to level off as soon as we realized that the rj that took off almost in formation with us was turning into us; we could have been in a collision course.

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Original NASA ASRS Text

Title: A320 flight crew reported an airborne conflict on departure with parallel departure which warranted an evasive maneuver.

Narrative: While on position for takeoff from runway 33L in Houston (IAH) we were given clearance for takeoff with a left turn to a heading of 270. The First Officer was performing the takeoff. While on our takeoff run we noticed that an RJ came in view to our right as he made his takeoff run on runway 33R. The RJ rotated only a second or two ahead of us. As we approached 400 feet and started the left turn to the assigned 270 degree heading; we noticed that the RJ was not moving at all on the First Office's sliding window. It was a bit confusing that the RJ was not diverging away from us. It took a few seconds to release that he too was in the left turn to our right an slightly above us. We started a level off as we realized that we were both give a turn west or southwest. We level off at around 2;000 feet for we lost sight of our traffic. On the TCAS; I noticed that we came within 700 feet of each other when we the First Officer pretty much leveled off. We did not descend for I saw on TCAS that the separation was increasing due to our near level off. We continued to climb when I made visual contact with the RJ that looked that he was heading South bound. I asked the tower if he had given both a turn left on departure and he responded with yes. Tower controller continued to say that the RJ turn was well inside of my turn. I disagreed with him and he ask me to switch over to departure control frequency. No TCAS warning was trigger in our cockpit.We believe that if we did not start to level off as soon as we realized that the RJ that took off almost in formation with us was turning into us; we could have been in a collision course.

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.