Narrative:

I was being vectored to intercept the 4R localizer approach at midway airport. Just prior to GS intercept we were advised that the WX was 4000 RVR and 1 1/2 mi visibility. Because I had 1 1/2 mi visibility and within 2 mi of being 'on the approach' I elected to continue the approach. We landed uneventfully. However, I realized that the RVR was below the min on the approach plate and RVR was controling for that runway. Even though the visibility was 1 1/2 mi and the approach plate said 5000 RVR or 1 mi, we were in the wrong. I think the approach plate should not have the 'or' written if RVR is controling.

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Original NASA ASRS Text

Title: ACR MLG ACFT CAPT MADE AN INST LNDG ON A RWY WHICH WAS BELOW PUBLISHED RWY VISUAL RANGE (RVR) MINS.

Narrative: I WAS BEING VECTORED TO INTERCEPT THE 4R LOC APCH AT MIDWAY ARPT. JUST PRIOR TO GS INTERCEPT WE WERE ADVISED THAT THE WX WAS 4000 RVR AND 1 1/2 MI VISIBILITY. BECAUSE I HAD 1 1/2 MI VISIBILITY AND WITHIN 2 MI OF BEING 'ON THE APCH' I ELECTED TO CONTINUE THE APCH. WE LANDED UNEVENTFULLY. HOWEVER, I REALIZED THAT THE RVR WAS BELOW THE MIN ON THE APCH PLATE AND RVR WAS CTLING FOR THAT RWY. EVEN THOUGH THE VISIBILITY WAS 1 1/2 MI AND THE APCH PLATE SAID 5000 RVR OR 1 MI, WE WERE IN THE WRONG. I THINK THE APCH PLATE SHOULD NOT HAVE THE 'OR' WRITTEN IF RVR IS CTLING.

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.