Narrative:

We were given takeoff clearance from runway 02L with a turn to 210 degrees. The tower warned us about traffic 3 miles out at 11 o'clock that had requested traffic pattern entry. We turned left after takeoff climbing to 3000 ft and within 15 seconds got a TCAS traffic warning immediately followed by a RA to descend. The pilot not flying saw the traffic and was alarmed and told me to steepen our bank angle. I banked to 45 to 60 degrees and made a very slight descent. We were about 300 ft AGL. The 182 passed behind us and the pilot not flying estimated it was about 1 mile away when we took evasive action. I had glanced at the TCAS several tines but was too busy controlling the plane to process and remember the details. I did see that it was 200 ft below us when it passed mile behind us. We considered talking to the tower about the conflict but got too busy with departure control and chicago air traffic and decided to focus on our climb. We discussed that this type of conflict probably wouldn't have happened at our home airport because the controllers would have either not cleared us for takeoff or vectored one of us out of harm's way. I feel like I should have been more involved in assessing the threat when we were given the position of the 182 but I was very focused on the takeoff. Possibly with deeper situational awareness I would have waited to turn until we passed the 182. The idea of '3 miles' led me to think we could turn inside him with no conflict.

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Original NASA ASRS Text

Title: CL-60 Captain departing DPA took evasive action when they received an RA on VFR inbound traffic.

Narrative: We were given takeoff clearance from Runway 02L with a turn to 210 degrees. The Tower warned us about traffic 3 miles out at 11 o'clock that had requested traffic pattern entry. We turned left after takeoff climbing to 3000 FT and within 15 seconds got a TCAS traffic warning immediately followed by a RA to descend. The pilot not flying saw the traffic and was alarmed and told me to steepen our bank angle. I banked to 45 to 60 degrees and made a very slight descent. We were about 300 FT AGL. The 182 passed behind us and the pilot not flying estimated it was about 1 mile away when we took evasive action. I had glanced at the TCAS several tines but was too busy controlling the plane to process and remember the details. I did see that it was 200 FT below us when it passed mile behind us. We considered talking to the Tower about the conflict but got too busy with Departure Control and Chicago air traffic and decided to focus on our climb. We discussed that this type of conflict probably wouldn't have happened at our home airport because the controllers would have either not cleared us for takeoff or vectored one of us out of harm's way. I feel like I should have been more involved in assessing the threat when we were given the position of the 182 but I was very focused on the takeoff. Possibly with deeper situational awareness I would have waited to turn until we passed the 182. The idea of '3 miles' led me to think we could turn inside him with no conflict.

Data retrieved from NASA's ASRS site as of April 2012 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.