An air carrier flight crew took evasive action in order to avoid a collision with an aircraft on sbn...

Narrative:

As we approached the sbn terminal area; approach control announced traffic operating over the stadium. We reported that we did not have him in sight. Approach control reported the airport location at 11 o'clock and 14 miles. We had the airport in sight and we reported such. Approach control cleared us for the visual approach to runway 27L. We descended to the MSA of 3000 ft to clear the antennas southeast of the airport. As we approached the antennas; we were switched over to tower. We checked in and tower advised us of the other aircraft. I had the traffic in sight at this time north of the airport; traveling west to east; and level with the horizon. I reported this to the tower. The tower instructed the other aircraft to remain north of the extended centerline of runway 9R/27L at all times; to which the pilot acknowledged that she would do so. Tower then cleared us to land. The other aircraft had not shown up on TCAS yet but we had her visually and she also reported to the tower that she had us in sight. The captain started descending after we passed the antennas and made a small turn towards the airport so as to pass behind the traffic. The traffic finally showed up on TCAS at a position about 4 miles away and 400 ft below us. As we descended; I saw the other aircraft start a turn and assumed that it was turning north as instructed by the tower. We received a TA a few seconds later and I again looked for the traffic. I saw that it had completed its turn and was coming right at us. At this point we received continuous ras from TCAS to descend and to descend faster. We noted the traffic was at a lower altitude so the captain increased power and initiated a climbing turn as an escape maneuver. Had we kept descending as TCAS instructed we would have impacted the other aircraft. After we received the clear of conflict announcement; I informed the tower that the traffic had been turned right into us. The tower replied indifferently that he was showing the aircraft at 2000 ft. We were at 2600 ft when we executed the escape maneuver and missed the traffic by about 200 ft. We then got the aircraft stabilized and landed without further incident. This incident was caused by the other pilot losing situational awareness and contributed to by the controller not monitoring the position of the traffic in relation to the extended centerline.

Original NASA ASRS Text

Title: An air carrier flight crew took evasive action in order to avoid a collision with an aircraft on SBN final after the traffic turned into their flight path.

Narrative: As we approached the SBN terminal area; Approach Control announced traffic operating over the stadium. We reported that we did not have him in sight. Approach Control reported the airport location at 11 o'clock and 14 miles. We had the airport in sight and we reported such. Approach Control cleared us for the visual approach to Runway 27L. We descended to the MSA of 3000 FT to clear the antennas southeast of the airport. As we approached the antennas; we were switched over to Tower. We checked in and Tower advised us of the other aircraft. I had the traffic in sight at this time north of the airport; traveling west to east; and level with the horizon. I reported this to the Tower. The Tower instructed the other aircraft to remain north of the extended centerline of Runway 9R/27L at all times; to which the pilot acknowledged that she would do so. Tower then cleared us to land. The other aircraft had not shown up on TCAS yet but we had her visually and she also reported to the Tower that she had us in sight. The Captain started descending after we passed the antennas and made a small turn towards the airport so as to pass behind the traffic. The traffic finally showed up on TCAS at a position about 4 miles away and 400 FT below us. As we descended; I saw the other aircraft start a turn and assumed that it was turning North as instructed by the Tower. We received a TA a few seconds later and I again looked for the traffic. I saw that it had completed its turn and was coming right at us. At this point we received continuous RAs from TCAS to descend and to descend faster. We noted the traffic was at a lower altitude so the Captain increased power and initiated a climbing turn as an escape maneuver. Had we kept descending as TCAS instructed we would have impacted the other aircraft. After we received the Clear of Conflict announcement; I informed the Tower that the traffic had been turned right into us. The Tower replied indifferently that he was showing the aircraft at 2000 FT. We were at 2600 FT when we executed the escape maneuver and missed the traffic by about 200 FT. We then got the aircraft stabilized and landed without further incident. This incident was caused by the other pilot losing situational awareness and contributed to by the Controller not monitoring the position of the traffic in relation to the extended centerline.

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.

Attributes
ACN	857537
Time
Date	200910
Local Time Of Day	1801-2400
Place
Locale Reference	SBN.Airport
State Reference	IN
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Make Model Name	Large Transport Low Wing 2 Turbojet Eng
Operating Under FAR Part	Part 121
Flight Phase	Final Approach
Route In Use	Visual Approach
Flight Plan	IFR
Aircraft 2
Make Model Name	Small Aircraft High Wing 1 Eng Fixed Gear
Operating Under FAR Part	Part 91
Flight Phase	Cruise
Flight Plan	VFR
Person 1
Function	Pilot Not Flying First Officer
Qualification	Flight Crew Flight Instructor Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 240 Flight Crew Total 4500 Flight Crew Type 1800
Events
Anomaly	Conflict NMAC
Miss Distance	Horizontal 0 Vertical 200

An air carrier flight crew took evasive action in order to avoid a collision with an aircraft on sbn final after the traffic turned into their flight path.