Narrative:

The WX at grb deteriorated from 1/2 mi visibility to 1/4 mi while we were en route to grb. I notified dispatch of the change and that grb is below minimums (1/2 mi is required). Dispatch then contacted grb tower and was told that grb tower visibility is 1/2 mi. This was relayed to me by dispatch and so we continued to grb. During our ILS approach to runway 36 at grb, we were advised that the WX was 500 overcast 1/4 sf but the tower is reporting a visibility of 1/2 mi. We landed on runway 36 based on the reported tower visibility 1/2 mi. After returning to dtw, we were advised that grb tower had reported us for landing while the visibility was below minimums. We later learned that the tower visibility being reported was an informational remark and served no purpose other than to cause confusion. Supplemental information from acn 262806: I had ground contact at about 1500 ft AGL and had the runway lights in sight at about 1 mi. When the WX at the destination is fluctuating, conflicting reports add to the burden of flying a 2 crew member aircraft. A simple advisory statement that the landing runway is below minimums would help to clarify the actual conditions.

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Original NASA ASRS Text

Title: AN ACR MLG LANDED BELOW MINIMUMS.

Narrative: THE WX AT GRB DETERIORATED FROM 1/2 MI VISIBILITY TO 1/4 MI WHILE WE WERE ENRTE TO GRB. I NOTIFIED DISPATCH OF THE CHANGE AND THAT GRB IS BELOW MINIMUMS (1/2 MI IS REQUIRED). DISPATCH THEN CONTACTED GRB TWR AND WAS TOLD THAT GRB TWR VISIBILITY IS 1/2 MI. THIS WAS RELAYED TO ME BY DISPATCH AND SO WE CONTINUED TO GRB. DURING OUR ILS APCH TO RWY 36 AT GRB, WE WERE ADVISED THAT THE WX WAS 500 OVCST 1/4 SF BUT THE TWR IS RPTING A VISIBILITY OF 1/2 MI. WE LANDED ON RWY 36 BASED ON THE RPTED TWR VISIBILITY 1/2 MI. AFTER RETURNING TO DTW, WE WERE ADVISED THAT GRB TWR HAD RPTED US FOR LNDG WHILE THE VISIBILITY WAS BELOW MINIMUMS. WE LATER LEARNED THAT THE TWR VISIBILITY BEING RPTED WAS AN INFORMATIONAL REMARK AND SERVED NO PURPOSE OTHER THAN TO CAUSE CONFUSION. SUPPLEMENTAL INFO FROM ACN 262806: I HAD GND CONTACT AT ABOUT 1500 FT AGL AND HAD THE RWY LIGHTS IN SIGHT AT ABOUT 1 MI. WHEN THE WX AT THE DEST IS FLUCTUATING, CONFLICTING RPTS ADD TO THE BURDEN OF FLYING A 2 CREW MEMBER ACFT. A SIMPLE ADVISORY STATEMENT THAT THE LNDG RWY IS BELOW MINIMUMS WOULD HELP TO CLARIFY THE ACTUAL CONDITIONS.

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.