Narrative:

While on our descent into bna, we were given a hold for 20- 30 mins due to low visibility at the airport. When visibility finally came up enough for CAT ii approachs, we were given a final descent and vectors for the approach. During our vectors, visibility jumped up and down between 800-1600 RVR. When being cleared for the approach, visibility was 1600 RVR, enough for the approach. But as we were just becoming established for the approach, another aircraft requested RVR readings, which were read back to the aircraft but not clearly heard. Once repeated, we were clearly established on the GS and approach. The approach was uneventful and a full landing was made. While I believe we were legal for the approach, the RVR given to the other aircraft was below approach minimums, and was given right at the point of establishment. If we had to do it again, I would probably request more vectors until another favorable RVR was read before flying the approach.

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Original NASA ASRS Text

Title: ACR HAD BEEN HOLDING FOR MINIMUM RVR WX. MINIMUMS RPTED AND WAS ON THE APCH AND JUST CAPTURED THE GS WHEN ANOTHER ACFT REQUESTED RVR. RPTED BELOW CAT II MINIMUMS. CONTINUED THE APCH SINCE ON THE LOC AND GS. LNDG NORMAL.

Narrative: WHILE ON OUR DSCNT INTO BNA, WE WERE GIVEN A HOLD FOR 20- 30 MINS DUE TO LOW VISIBILITY AT THE ARPT. WHEN VISIBILITY FINALLY CAME UP ENOUGH FOR CAT II APCHS, WE WERE GIVEN A FINAL DSCNT AND VECTORS FOR THE APCH. DURING OUR VECTORS, VISIBILITY JUMPED UP AND DOWN BTWN 800-1600 RVR. WHEN BEING CLRED FOR THE APCH, VISIBILITY WAS 1600 RVR, ENOUGH FOR THE APCH. BUT AS WE WERE JUST BECOMING ESTABLISHED FOR THE APCH, ANOTHER ACFT REQUESTED RVR READINGS, WHICH WERE READ BACK TO THE ACFT BUT NOT CLRLY HEARD. ONCE REPEATED, WE WERE CLRLY ESTABLISHED ON THE GS AND APCH. THE APCH WAS UNEVENTFUL AND A FULL LNDG WAS MADE. WHILE I BELIEVE WE WERE LEGAL FOR THE APCH, THE RVR GIVEN TO THE OTHER ACFT WAS BELOW APCH MINIMUMS, AND WAS GIVEN RIGHT AT THE POINT OF ESTABLISHMENT. IF WE HAD TO DO IT AGAIN, I WOULD PROBABLY REQUEST MORE VECTORS UNTIL ANOTHER FAVORABLE RVR WAS READ BEFORE FLYING THE APCH.

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.