Narrative:

On approach into cvg, the reported WX was visibility 1/2 mi, 200 ft overcast, RVR 6000 ft. The captain was a high minimums captain and we did not establish the necessary visual requirements to continue the approach and went missed. We were vectored back around on downwind for a second attempt for runway 36R ILS when we received an airfoil deice fail cas. When the captain checked the left wing to see if we were accumulating ice, he noticed the boot had developed a tear approximately 12 inches long, and 2 ft outboard of the pylon. This portion of the boot had subsequently been filled with air and had inflated to the size of a large football protruding above the wing. We declared an emergency and were vectored to join the approach. I did not at any time notice any adverse ctlability and continued to a normal approach and landing. The passenger were deplaned normally and none of them noticed the tear on the boot during deplaning.

Google
 

Original NASA ASRS Text

Title: A DORNIER D328 ON APCH AT 3000 FT IN ICING DECLARED AN EMER DUE TO CAPT DISCOVERING THE L WING DEICER BOOT IS TORN.

Narrative: ON APCH INTO CVG, THE RPTED WX WAS VISIBILITY 1/2 MI, 200 FT OVCST, RVR 6000 FT. THE CAPT WAS A HIGH MINIMUMS CAPT AND WE DID NOT ESTABLISH THE NECESSARY VISUAL REQUIREMENTS TO CONTINUE THE APCH AND WENT MISSED. WE WERE VECTORED BACK AROUND ON DOWNWIND FOR A SECOND ATTEMPT FOR RWY 36R ILS WHEN WE RECEIVED AN AIRFOIL DEICE FAIL CAS. WHEN THE CAPT CHKED THE L WING TO SEE IF WE WERE ACCUMULATING ICE, HE NOTICED THE BOOT HAD DEVELOPED A TEAR APPROX 12 INCHES LONG, AND 2 FT OUTBOARD OF THE PYLON. THIS PORTION OF THE BOOT HAD SUBSEQUENTLY BEEN FILLED WITH AIR AND HAD INFLATED TO THE SIZE OF A LARGE FOOTBALL PROTRUDING ABOVE THE WING. WE DECLARED AN EMER AND WERE VECTORED TO JOIN THE APCH. I DID NOT AT ANY TIME NOTICE ANY ADVERSE CTLABILITY AND CONTINUED TO A NORMAL APCH AND LNDG. THE PAX WERE DEPLANED NORMALLY AND NONE OF THEM NOTICED THE TEAR ON THE BOOT DURING DEPLANING.

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.