Date: 201706
Local time of day: 1201-1800
Location: ZZZ.Airport, US
Flight conditions: VMC
Weather elements / visibility: Windshear
Light: Daylight
Aircraft: Regional Jet 200 ER/LR (CRJ200)
Operator: Air Carrier
Operating under: Part 121
Flight plan: IFR
Flight phase: Takeoff / Launch
ATC / advisory: Tower ZZZ
Aircraft component: Turbine Engine Thrust Reverser
Component problem: Malfunctioning
Reporter organization: Air Carrier
Reporter function: Pilot Not Flying; Captain
Reporter qualification: Flight Crew Air Transport Pilot (ATP)
Human factors: Time Pressure
Second reporter function: First Officer; Pilot Flying
Anomaly: Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural MEL / CDL
Detector: Person Flight Crew
When detected: Other takeoff roll
Result: Flight Crew Rejected Takeoff; Flight Crew Returned To Gate; General Maintenance Action
Contributing factors: Aircraft; Human Factors
Primary problem: Aircraft

Narrative: I made the decision to reject the takeoff at what I believe was around 115 knots because of a Left Thrust Rev Unsafe caution message. I took control of the aircraft; doing the aborted takeoff; and slowing back to a safe taxi speed. We exited the runway and safely taxied back to the terminal to call maintenance.The left thrust reverser had been written up and placed on an MEL the prior day. The flight that we did the rejected takeoff was our fifth flight of the day. On the previous four flights we had gotten the same message 'Left Thrust Rev Unsafe' caution message after the plane had left the ground and was weight off wheels per the MEL. This happened the exact same time on each and every flight except for the flight when we aborted the takeoff. The caution message happened at what I remember was 115 knots just below our V1 speed of 129 knots. Because the caution message happened at a different time or point in our takeoff and departure than the previous four flights I made the decision to discontinue the takeoff. Another factor that I feel may have been a factor in the rejected takeoff was we had a problem with the plane before this flight. We had written the plane up for a Prox System Fault that was cleared by maintenance. Knowing there was history of problems with the Prox System caused me to wonder if there was some problem that may have been bigger than our original message of a Left Thrust Rev Unsafe message. I chose to abort the takeoff for the safety of the flight.As a flight crew I felt I could have been a better leader in leading the briefing of the situation that we were in. We had brief the weather and terrain that was around us but briefing all the potential problems and messages we were going to receive because of this MEL. This was the fourth flight of the day in this airplane and my briefing was probably a little rushed through. Complacency was setting in from dealing with this issue all day. Next time I will tackle the briefing as if it was the first time we had briefed the problem and possible situations it can put us in no matter if it is the first flight of the day or the sized flight of the day.


Second narrative: I was Pilot Flying; and as we began the takeoff roll all indications were normal. After the airspeed check callout; I transitioned my eyes outside. As we approached V1; a gust of wind (straight down the runway at 23G33) hit and I could feel the nose gear become very light. [Shortly] after I heard the caution message chime and we received a L REV UNSAFE caution message. At this point the main landing gear were still on the ground. I believe we were close to V1; however my eyes were outside and I can't recall hearing any V speed callouts. The Captain called 'Abort; my controls' to which I responded 'Your controls'. We were able to stop by the end of the runway and taxi back to the gate area.Fixation on LLWS; led to complacency with other threats; including L REV MEL and associated L REV UNSAFE caution message. Previous delay of inbound leg led to rushing; compounded by the quick turn. Also; approaching weather contributed to sense of urgency to depart quickly. Wind gust on takeout may have possibly caused premature rotation of aircraft nose; leading to L REV UNSAFE caution message with main gear still on the ground; causing Captain to call for the abort.


Synopsis: CRJ-200 flight crew reported rejecting the takeoff at approximately 115 knots; about 14 knots below V1; after receiving a LEFT THRUST REV caution message.