Narrative:

Everything was normal until [the] takeoff phase of the flight. It was a snowy day which required de-icing. We completed all the checklists and procedures for takeoff. We were cleared for takeoff. The captain was the pilot flying and he applied T/O thrust. We accelerated normally and became airborne. About 10 seconds after retracting the gear; 'brake ovht (overheat)' warning message displayed on EICAS and btms (brake temperature monitoring system) red for right inboard. I called it and the captain then said 'I have the radios; brake ovht emergency checklist.' the checklist led us to the QRH and QRH instructed us to lower the landing gear. After lowering the landing gear the temperature decreased all the way to within the specified green range. Then the QRH led us to put the gear back up and continue flight if no further indications occurred. However; when we retracted the gear again; the same btms temperature started increasing rapidly. The captain called gear down; and I put the gear down and this action brought the temperature down again. At that point the captain advised ATC due to possible fire and we leveled off at 5;000 feet. When we ran the QRH again the QRH led us to 'land nearest suitable airport.' we advised ATC that we needed about 15 minutes and vectors to stay close to the airport and completed after takeoff checklist. The captain transferred the flight controls to me and communicated with flight attendants for potential fire and dispatch. In the meantime I loaded FMS and then briefed the approach to be flown. Then the captain took the controls back; we ran the descent and approach checklists. Initiated the approach and came to a complete stop on the runway after a fairly smooth landing and completing after landing shutdown checks; we requested arff (aircraft rescue and fire fighting). After fire rescue verified there was no indication of fire we requested to be towed to the gate and be escorted by fire rescue. We completed the flight safely at the gate and maintenance personnel met us at the aircraft.the mechanic told us that it was a btms sensor malfunction.

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Original NASA ASRS Text

Title: CRJ-900 flight crew reported a malfunctioning brake temperature monitoring system sensor caused multiple brake overheat EICAS messages; requiring an air turn back.

Narrative: Everything was normal until [the] takeoff phase of the flight. It was a snowy day which required de-icing. We completed all the checklists and procedures for takeoff. We were cleared for takeoff. The Captain was the pilot flying and he applied T/O thrust. We accelerated normally and became airborne. About 10 seconds after retracting the gear; 'BRAKE OVHT (Overheat)' warning message displayed on EICAS and BTMS (Brake Temperature Monitoring System) red for Right Inboard. I called it and the Captain then said 'I have the radios; BRAKE OVHT emergency checklist.' The checklist led us to the QRH and QRH instructed us to lower the landing gear. After lowering the landing gear the temperature decreased all the way to within the specified green range. Then the QRH led us to put the gear back up and continue flight if no further indications occurred. However; when we retracted the gear again; the same BTMS temperature started increasing rapidly. The Captain called gear down; and I put the gear down and this action brought the temperature down again. At that point the Captain advised ATC due to possible fire and we leveled off at 5;000 feet. When we ran the QRH again the QRH led us to 'land nearest suitable airport.' We advised ATC that we needed about 15 minutes and vectors to stay close to the airport and completed After Takeoff checklist. The Captain transferred the flight controls to me and communicated with flight attendants for potential fire and Dispatch. In the meantime I loaded FMS and then briefed the approach to be flown. Then the Captain took the controls back; we ran the descent and Approach checklists. Initiated the approach and came to a complete stop on the runway after a fairly smooth landing and completing After Landing Shutdown checks; we requested ARFF (Aircraft Rescue and Fire Fighting). After fire rescue verified there was no indication of fire we requested to be towed to the gate and be escorted by fire rescue. We completed the flight safely at the gate and Maintenance personnel met us at the aircraft.The Mechanic told us that it was a BTMS sensor malfunction.

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.