Narrative:

While performing takeoff we experienced a master warning and triple chime for takeoff configuration; brakes. Since it was a configuration warning we deemed the aircraft unsafe to fly and aborted the takeoff at approximately at 115 knots IAS. We contacted the tower and exited the runway. We subsequently contacted [maintenance] and [operations] and returned to the gate.we believe that there may have been an erroneous takeoff configuration sensor since we were accelerating at a high speed when we aborted. The conversation with maintenance after the event confirmed this suspicion.we believe that this situation indicated an 'aircraft unsafe to fly' situation that warranted a rejected takeoff above 80 knots. Since the configuration warning was not immediately and specifically identified; we didn't know if the trim; spoilers or flaps had possibly came into a wrong position. We deemed that there was sufficient runway remaining and that a runway excursion would not be caused by the abort. All procedures and checklists were properly complied with prior to takeoff.

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Original NASA ASRS Text

Title: EMB-145 flight crew reported a high speed rejected takeoff due to a takeoff configuration master warning; which was later found to be false.

Narrative: While performing takeoff we experienced a Master Warning and triple chime for takeoff configuration; brakes. Since it was a configuration warning we deemed the aircraft unsafe to fly and aborted the takeoff at approximately at 115 knots IAS. We contacted the Tower and exited the runway. We subsequently contacted [Maintenance] and [Operations] and returned to the gate.We believe that there may have been an erroneous takeoff configuration sensor since we were accelerating at a high speed when we aborted. The conversation with Maintenance after the event confirmed this suspicion.We believe that this situation indicated an 'aircraft unsafe to fly' situation that warranted a rejected takeoff above 80 knots. Since the configuration warning was not immediately and specifically identified; we didn't know if the trim; spoilers or flaps had possibly came into a wrong position. We deemed that there was sufficient runway remaining and that a runway excursion would not be caused by the abort. All procedures and checklists were properly complied with prior to takeoff.

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.