Narrative:

Arrived at cmh just as runway 28L opened after plowing. ATIS was reported as 27 broken 45 overcast 7ZR -30 degrees 190 /15 29.81, braking report equaled good. No comments made regarding txwys or runway exits. Landed on runway 28L and rollout braking was good. Slowed to taxi speed to exit runway 28L at C4. As we exited the plowed portion of runway 28L onto C4, apparently taxied onto area of clear ice. Lost all control of nose steering and braking. Aircraft slowly slid off left side of taxiway C4. Left main mount and possibly nosewheel off taxiway onto frozen ground. Let aircraft continue to roll by discontinuing attempted braking and it rolled back onto intersection of C4 and taxiway C, where I managed to stop aircraft with brakes on centerline of taxiway C. Notified tower and ground that we had slid off taxiway and requested our maintenance to come check aircraft prior to continued taxi. Had crash crew check to see if any taxiway lights or other objects had been impacted. Maintenance came out and checked aircraft, saw no problem, and we taxied to gate. Had airport manager rechk taxiway C4 and he stated tracks indicated aircraft did not roll over any taxi lights or break through ground crust. I believe I was misled by good braking on the runway and apparently clear exit. Visually the exit looked in as good condition as the runway. Should have been more alert to possibility of clear ice on taxiway C4 as result of previous plowing of runway. If tower was aware of condition of exits, would have been very beneficial to have had a warning/alert from them. This has served to renew my vigilance on contaminated runways and txwys. After 25 yrs of operating experience in all types of WX conditions, this incident proved again how quickly icing conditions can change and affect safe operations.

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Original NASA ASRS Text

Title: TXWY EXCURSION AFTER LOSS OF ACFT CTL.

Narrative: ARRIVED AT CMH JUST AS RWY 28L OPENED AFTER PLOWING. ATIS WAS RPTED AS 27 BROKEN 45 OVCST 7ZR -30 DEGS 190 /15 29.81, BRAKING RPT EQUALED GOOD. NO COMMENTS MADE REGARDING TXWYS OR RWY EXITS. LANDED ON RWY 28L AND ROLLOUT BRAKING WAS GOOD. SLOWED TO TAXI SPD TO EXIT RWY 28L AT C4. AS WE EXITED THE PLOWED PORTION OF RWY 28L ONTO C4, APPARENTLY TAXIED ONTO AREA OF CLR ICE. LOST ALL CTL OF NOSE STEERING AND BRAKING. ACFT SLOWLY SLID OFF L SIDE OF TXWY C4. L MAIN MOUNT AND POSSIBLY NOSEWHEEL OFF TXWY ONTO FROZEN GND. LET ACFT CONTINUE TO ROLL BY DISCONTINUING ATTEMPTED BRAKING AND IT ROLLED BACK ONTO INTXN OF C4 AND TXWY C, WHERE I MANAGED TO STOP ACFT WITH BRAKES ON CTRLINE OF TXWY C. NOTIFIED TWR AND GND THAT WE HAD SLID OFF TXWY AND REQUESTED OUR MAINT TO COME CHK ACFT PRIOR TO CONTINUED TAXI. HAD CRASH CREW CHK TO SEE IF ANY TXWY LIGHTS OR OTHER OBJECTS HAD BEEN IMPACTED. MAINT CAME OUT AND CHKED ACFT, SAW NO PROB, AND WE TAXIED TO GATE. HAD ARPT MGR RECHK TXWY C4 AND HE STATED TRACKS INDICATED ACFT DID NOT ROLL OVER ANY TAXI LIGHTS OR BREAK THROUGH GND CRUST. I BELIEVE I WAS MISLED BY GOOD BRAKING ON THE RWY AND APPARENTLY CLR EXIT. VISUALLY THE EXIT LOOKED IN AS GOOD CONDITION AS THE RWY. SHOULD HAVE BEEN MORE ALERT TO POSSIBILITY OF CLR ICE ON TXWY C4 AS RESULT OF PREVIOUS PLOWING OF RWY. IF TWR WAS AWARE OF CONDITION OF EXITS, WOULD HAVE BEEN VERY BENEFICIAL TO HAVE HAD A WARNING/ALERT FROM THEM. THIS HAS SERVED TO RENEW MY VIGILANCE ON CONTAMINATED RWYS AND TXWYS. AFTER 25 YRS OF OPERATING EXPERIENCE IN ALL TYPES OF WX CONDITIONS, THIS INCIDENT PROVED AGAIN HOW QUICKLY ICING CONDITIONS CAN CHANGE AND AFFECT SAFE OPS.

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.