Narrative:

I confused runways 10L and 10R with runways 28R and 28L; probably because of their close alignment with the direction from which I was approaching (I was arriving from the west; so runways 10L and 10R somehow seemed more appropriate even when told to expect 28L). After having confused the direction of the runways; being told to make a right midfield downwind for 28R made me think I needed to fly southeast bound to essentially come from the opposite direction toward what was really 10R. At this point I should have proceeded to query the controller but flew southeast bound instead. After just a bit of flight to the southeast; the controller told me to fly southeast for the downwind to 28L (I'm giving her the benefit of the doubt; but I was still thinking 10R and that she'd said 28R); confusing me further. Eventually after flying a left downwind for 28L; I asked if she wanted me to extend my downwind; but she replied that she then wanted a left base to 28L and cleared me to land; which I did without incident.

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Original NASA ASRS Text

Title: C172 pilot reports confusing Runways 10L and 10R with Runways 28R and 28L; while arriving from the west. An inappropriate ground track is flown when instructed to make a right midfield downwind for 28R. With ATC assistance a successful landing ensues.

Narrative: I confused Runways 10L and 10R with Runways 28R and 28L; probably because of their close alignment with the direction from which I was approaching (I was arriving from the west; so runways 10L and 10R somehow seemed more appropriate even when told to expect 28L). After having confused the direction of the runways; being told to make a right midfield downwind for 28R made me think I needed to fly southeast bound to essentially come from the opposite direction toward what was really 10R. At this point I should have proceeded to query the Controller but flew southeast bound instead. After just a bit of flight to the southeast; the Controller told me to fly southeast for the downwind to 28L (I'm giving her the benefit of the doubt; but I was still thinking 10R and that she'd said 28R); confusing me further. Eventually after flying a left downwind for 28L; I asked if she wanted me to extend my downwind; but she replied that she then wanted a left base to 28L and cleared me to land; which I did without incident.

Data retrieved from NASA's ASRS site as of July 2013 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.