Narrative:

During approach into ord, we were told to expect short approach to runway 9L. While turning from downwind to base, we were cleared for the visual and to maintain separation from an aircraft on approach to runway 9R. The captain was the PF. While in the turn we were configuring and trying to get down quickly. I noticed the captain lining up for runway 9R. I immediately initiated a turn to the left, and then verbalized what was happening. The captain quickly continued the turn and we landed uneventfully on runway 9L.

Google
 

Original NASA ASRS Text

Title: DURING TURN TO FINAL AT ORD, FO NOTICED CAPT LINING UP WITH WRONG RWY AND IMMEDIATELY INITIATED A TURN TO THE ASSIGNED RWY.

Narrative: DURING APCH INTO ORD, WE WERE TOLD TO EXPECT SHORT APCH TO RWY 9L. WHILE TURNING FROM DOWNWIND TO BASE, WE WERE CLRED FOR THE VISUAL AND TO MAINTAIN SEPARATION FROM AN ACFT ON APCH TO RWY 9R. THE CAPT WAS THE PF. WHILE IN THE TURN WE WERE CONFIGURING AND TRYING TO GET DOWN QUICKLY. I NOTICED THE CAPT LINING UP FOR RWY 9R. I IMMEDIATELY INITIATED A TURN TO THE L, AND THEN VERBALIZED WHAT WAS HAPPENING. THE CAPT QUICKLY CONTINUED THE TURN AND WE LANDED UNEVENTFULLY ON RWY 9L.

Data retrieved from NASA's ASRS site as of July 2007 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.