Narrative:

Flight to ZZZ was normal and uneventful in all respects until touch down on runway xx in ZZZ. The weather was VMC with light winds; and the runway was dry. I was pilot monitoring; and the first officer (first officer) flew a visual approach backed up by the ILS. He flew a good approach; and was on speed and on glide path. He was maybe 5 knots fast at touchdown; but the touchdown was made in the touchdown zone. The aircraft was on centerline; and shortly after touchdown the thrust reversers were deployed and appeared to be operating normally. However; the aircraft didn't seem to be decelerating normally; and we were still at approximately 100 knots and quickly approaching the runway midpoint when the event occurred. The aircraft gently went right; and I was confident the first officer would bring it back to centerline. However; the opposite occurred; and the aircraft turned hard right suddenly; and still at a high rate of speed. Full left rudder and maximum braking didn't seem to help and the aircraft remained uncontrollable. The aircraft picked taxiway Y as its exit point; but it was left of the centerline. I was able to bring it to a stop before reaching taxiway X. The aircraft behind us was told to go around as we were not clear of the runway; but I taxied clear shortly afterwards. Tower called to ask what happened and asked if we needed assistance. I told them we had a brake issue; and I asked for arff (airport rescue and fire fighting) to inspect the landing gear before we moved the aircraft further. At this time; I made a PA to our customers and gave them a brief description as to what occurred and that for safety reasons we were going to have the aircraft inspected before we continued the taxi. I also instructed everyone to remain seated with their seat belts fastened. I also sent dispatch and maintenance control an ACARS at this time. Arff came and inspected the airplane and felt that it was safe for taxi; but informed us that we had hit a taxi light during the excursion. I looked towards the area where we went off the runway; and noticed 4 solid skid marks all the way off the runway. Approximately 20-25 minutes after landing; we were able to continue our taxi to the gate and at normal taxi speeds the aircraft steered normally. Arff followed us to the gate. Maintenance met us at the gate and helped with the inspection. The left nose wheel tire; and the left main outboard tire showed damage mainly on the sidewall area. Which I assume was from turning at a high rate of speed and somewhat skidding sideways. The left outboard brake was found to be worn beyond limits also. The btms (brake temperature monitoring system) for the left brakes was at 8 and 7; and 2 and 3 for the right brakes. I'm really at a loss as to the root cause of this event. We didn't receive any cautions or warnings either. The fact that very dark visible skid marks were visible makes me suspicious of the anti-skid system. As it was armed and should've been working. I also question the position of the nose wheel; and worn brake on the left main. However as I mentioned earlier; I don't have any concrete answers as to the cause of the event.

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Original NASA ASRS Text

Title: A Regional Jet flight crew reported a loss of control during the landing roll which resulted in an excursion; and contact with a taxi light. The loss of directional control was presumed to be due to a brake system malfunction.

Narrative: Flight to ZZZ was normal and uneventful in all respects until touch down on Runway XX in ZZZ. The weather was VMC with light winds; and the runway was dry. I was pilot monitoring; and the FO (First Officer) flew a visual approach backed up by the ILS. He flew a good approach; and was on speed and on glide path. He was maybe 5 knots fast at touchdown; but the touchdown was made in the touchdown zone. The aircraft was on centerline; and shortly after touchdown the thrust reversers were deployed and appeared to be operating normally. However; the aircraft didn't seem to be decelerating normally; and we were still at approximately 100 knots and quickly approaching the runway midpoint when the event occurred. The aircraft gently went right; and I was confident the FO would bring it back to centerline. However; the opposite occurred; and the aircraft turned hard right suddenly; and still at a high rate of speed. Full left rudder and maximum braking didn't seem to help and the aircraft remained uncontrollable. The aircraft picked taxiway Y as its exit point; but it was left of the centerline. I was able to bring it to a stop before reaching taxiway X. The aircraft behind us was told to go around as we were not clear of the runway; but I taxied clear shortly afterwards. Tower called to ask what happened and asked if we needed assistance. I told them we had a brake issue; and I asked for ARFF (Airport Rescue and Fire Fighting) to inspect the landing gear before we moved the aircraft further. At this time; I made a PA to our customers and gave them a brief description as to what occurred and that for safety reasons we were going to have the aircraft inspected before we continued the taxi. I also instructed everyone to remain seated with their seat belts fastened. I also sent Dispatch and Maintenance Control an ACARS at this time. ARFF came and inspected the airplane and felt that it was safe for taxi; but informed us that we had hit a taxi light during the excursion. I looked towards the area where we went off the runway; and noticed 4 solid skid marks all the way off the runway. Approximately 20-25 minutes after landing; we were able to continue our taxi to the gate and at normal taxi speeds the aircraft steered normally. ARFF followed us to the gate. Maintenance met us at the gate and helped with the inspection. The left nose wheel tire; and the left main outboard tire showed damage mainly on the sidewall area. Which I assume was from turning at a high rate of speed and somewhat skidding sideways. The left outboard brake was found to be worn beyond limits also. The BTMS (Brake Temperature Monitoring System) for the left brakes was at 8 and 7; and 2 and 3 for the right brakes. I'm really at a loss as to the root cause of this event. We didn't receive any cautions or warnings either. The fact that very dark visible skid marks were visible makes me suspicious of the anti-skid system. As it was armed and should've been working. I also question the position of the nose wheel; and worn brake on the left main. However as I mentioned earlier; I don't have any concrete answers as to the cause of the event.

Data retrieved from NASA's ASRS site 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.