Narrative:

After normal approach and landing on runway 09 at cedar rapids, I taxied the airplane off at taxiway alpha and proceeded to taxi toward taxiway charley for a turn to get us to gate. As we rounded the corner I felt a slight tug on the right side of the airplane, which was barely noticeable. The airplane was on the taxiway centerline from my view, so I thought we had a dragging brake. After parking, I inspected the right main gear and saw dirt on both tires. I then assumed that we had gone into the grass and called maintenance who had the airplane inspected. On arriving at the airport the next morning I had airport security take the crew to the area to inspect it. This was after we had been informed that the airport authorities had found dirt on the taxiway at the point where we experienced the bump. It appears to me that another airplane may have taxied off the taxiway and left dirt on the taxiway edge and that this was what we ran over. After visual inspection of the taxiway area where taxiway a joins taxiway C at cid, it appears that the curving taxiway centerline contributed to approaching the edge of the taxiway during the turn from a to C. Where the line from taxiway a extended an additional 15 to 20 ft before it curves into the taxiway C centerline it would significantly increase the safety margin during the turn.

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Original NASA ASRS Text

Title: ACR ACFT ENCOUNTERS MUD AND DIRT LEFT BY A PREVIOUS ACFT THAT HAD A TXWY EXCURSION AT THE INTXN OF TAXIWAY'S A AND C AT CID.

Narrative: AFTER NORMAL APPROACH AND LANDING ON RWY 09 AT CEDAR RAPIDS, I TAXIED THE AIRPLANE OFF AT TXWY ALPHA AND PROCEEDED TO TAXI TOWARD TXWY CHARLEY FOR A TURN TO GET US TO GATE. AS WE ROUNDED THE CORNER I FELT A SLIGHT TUG ON THE RIGHT SIDE OF THE AIRPLANE, WHICH WAS BARELY NOTICEABLE. THE AIRPLANE WAS ON THE TXWY CENTERLINE FROM MY VIEW, SO I THOUGHT WE HAD A DRAGGING BRAKE. AFTER PARKING, I INSPECTED THE RIGHT MAIN GEAR AND SAW DIRT ON BOTH TIRES. I THEN ASSUMED THAT WE HAD GONE INTO THE GRASS AND CALLED MAINT WHO HAD THE AIRPLANE INSPECTED. ON ARRIVING AT THE ARPT THE NEXT MORNING I HAD ARPT SECURITY TAKE THE CREW TO THE AREA TO INSPECT IT. THIS WAS AFTER WE HAD BEEN INFORMED THAT THE ARPT AUTHORITIES HAD FOUND DIRT ON THE TXWY AT THE POINT WHERE WE EXPERIENCED THE BUMP. IT APPEARS TO ME THAT ANOTHER AIRPLANE MAY HAVE TAXIED OFF THE TXWY AND LEFT DIRT ON THE TXWY EDGE AND THAT THIS WAS WHAT WE RAN OVER. AFTER VISUAL INSPECTION OF THE TXWY AREA WHERE TXWY A JOINS TXWY C AT CID, IT APPEARS THAT THE CURVING TXWY CENTERLINE CONTRIBUTED TO APPROACHING THE EDGE OF THE TXWY DURING THE TURN FROM A TO C. WHERE THE LINE FROM TXWY A EXTENDED AN ADDITIONAL 15 TO 20 FT BEFORE IT CURVES INTO THE TXWY C CENTERLINE IT WOULD SIGNIFICANTLY INCREASE THE SAFETY MARGIN DURING THE TURN.

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.