Narrative:

My student had landed on runway 32R at champaign; il. At the time winds were 290 degrees at 19 KTS. The student's touchdown was smooth with a full stall landing. On the landing rollout the student applied brakes and the left brake locked. The aircraft veered sharply to the left. At that point I took over control of the aircraft; released any braking and applied full nose-up elevator and full right rudder in an attempt to keep the plane on the runway. The left brake remained locked and when it was apparent the aircraft would depart the side of the runway I shut down the engine to prevent a propeller strike. The aircraft stopped approximately 20 ft off the left side of the runway; missing any obstructions. No damage was done to the aircraft or the airport facilities. After getting the aircraft back to the pavement it was inspected and with approval from the maintenance department was flown home. Factors contributing to this incident were the cold conditions and possibly ice on the brakes. Next time I fly in that type of WX I will delay brake application until at a lower speed to hopefully maintain control of the aircraft should the brakes lock; or not apply brakes at all. Supplemental information from acn 725883: after a quick inspection of the aircraft; a chunk of ice frozen onto the left brake pad was discovered. Icing on the left brake was the probable factor in the runway excursion.

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Original NASA ASRS Text

Title: STUDENT PLT AND INSTRUCTOR EXPERIENCE A RWY EXCURSION AFTER LANDING AT CMI. APPARENT CAUSE IS ICE ACCUMULATION ON LEFT BRAKE ASSEMBLY DISCOVERED ON INSPECTION.

Narrative: MY STUDENT HAD LANDED ON RWY 32R AT CHAMPAIGN; IL. AT THE TIME WINDS WERE 290 DEGS AT 19 KTS. THE STUDENT'S TOUCHDOWN WAS SMOOTH WITH A FULL STALL LNDG. ON THE LNDG ROLLOUT THE STUDENT APPLIED BRAKES AND THE L BRAKE LOCKED. THE ACFT VEERED SHARPLY TO THE L. AT THAT POINT I TOOK OVER CTL OF THE ACFT; RELEASED ANY BRAKING AND APPLIED FULL NOSE-UP ELEVATOR AND FULL R RUDDER IN AN ATTEMPT TO KEEP THE PLANE ON THE RWY. THE L BRAKE REMAINED LOCKED AND WHEN IT WAS APPARENT THE ACFT WOULD DEPART THE SIDE OF THE RWY I SHUT DOWN THE ENG TO PREVENT A PROP STRIKE. THE ACFT STOPPED APPROX 20 FT OFF THE L SIDE OF THE RWY; MISSING ANY OBSTRUCTIONS. NO DAMAGE WAS DONE TO THE ACFT OR THE ARPT FACILITIES. AFTER GETTING THE ACFT BACK TO THE PAVEMENT IT WAS INSPECTED AND WITH APPROVAL FROM THE MAINT DEPT WAS FLOWN HOME. FACTORS CONTRIBUTING TO THIS INCIDENT WERE THE COLD CONDITIONS AND POSSIBLY ICE ON THE BRAKES. NEXT TIME I FLY IN THAT TYPE OF WX I WILL DELAY BRAKE APPLICATION UNTIL AT A LOWER SPD TO HOPEFULLY MAINTAIN CTL OF THE ACFT SHOULD THE BRAKES LOCK; OR NOT APPLY BRAKES AT ALL. SUPPLEMENTAL INFO FROM ACN 725883: AFTER A QUICK INSPECTION OF THE ACFT; A CHUNK OF ICE FROZEN ONTO THE L BRAKE PAD WAS DISCOVERED. ICING ON THE L BRAKE WAS THE PROBABLE FACTOR IN THE RWY EXCURSION.

Data retrieved from NASA's ASRS site as of January 2009 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.