Date: 202011
Local time of day: 0601-1200
Location: ZZZ.Airport, US
Flight conditions: VMC
Aircraft: Commercial Fixed Wing
Operator: Air Carrier
Operating under: Part 121
Flight plan: IFR
Mission: Passenger
Flight phase: Takeoff / Launch
Airspace: Class C ZZZ
ATC / advisory: Tower ZZZ
Second aircraft: Light Transport
Reporter organization: Air Carrier
Reporter function: Captain; Pilot Flying
Reporter qualification: Flight Crew Air Transport Pilot (ATP)
Human factors: Communication Breakdown
Second reporter function: Pilot Not Flying; First Officer
Anomaly: ATC Issue All Types; Conflict Ground Conflict; Less Severe
Detector: Person Air Traffic Control
Result: Air Traffic Control Issued New Clearance; Flight Crew FLC complied w / Automation / Advisory; Flight Crew Rejected Takeoff
Contributing factors: Procedure
Primary problem: Procedure

Narrative: High speed abort.Captain at controls.Cleared for takeoff and Tower advised aircraft on 5 mile final as we approached the RWY (Runway). Approximately 1/4 way down runway into our takeoff roll; Challenger announced going around left side. At approximately 1/2 way down runway into our takeoff roll; Tower directed us to abort our takeoff. We were in the high-speed regime at approximately 115 kts. I could see the jet going around on our left abeam; in my peripheral vision as we were aborting.Maximum reverse application w/ maximum brakes. Uneventful abort; cleared runway onto Taxiway F and brought jet to a stop. Manually held brakes while running all applicable checklists. 2 MLG (Main Landing Gear) trucks reached 610 C; others approximately 590 C. Brake temp cooling chart referenced 35 mins used; brakes took approximately 50 min to cool to 270 C. In the meantime; ZZZ Fire-Rescue examined MLG. No evidence of overheat. Conferred with [Maintenance Control] for any further guidance. Later; Maintenance came to the jet; examined MLG per [Maintenance Control] guidance and gave us a thumbs up.In the meantime; we had a conference call with Flight Ops Management and ZZZ Station Ops. Both gave us the ok to continue'.Maintenance Control sent us a new maintenance release; Dispatch sent Release 3. Brake temp left main was the highest temp; at approximately 240 C when we began taxi. No noticeable increases.We departed ZZZ; kept gear down for approximately 5 minutes til all MLG brakes were below 200 C and decreasing. Retracted gear and continued to ZZZ1 via the flight plan.As a side-note; we received an ACARS message at approximately 7;000 ft.; on climbout; directing us to return to gate for another check. We leveled at 9;000 ft.; called Dispatch for clarification. He talked to Maintenance Control and surmised the return to gate message was an old message and may have been caught up in the ACARS system somehow and decided to transmit to us after takeoff roll. Anyhow; message was deemed as received in error and we got a thumbs up to continue OPS (Operations) normal to ZZZ1. I'm not sure if this is something systemic to Company 2 ACARS interface or not; but this issue might need to be examined."


Second narrative: Cleared takeoff at ZZZ with aircraft on 5 nm final. As we began our roll I heard the aircraft on final say they were initiating a go-around. Around 115 KIAS the Tower directed us to reject which we accomplished. We told the passengers to remain seated and we taxied clear to find a place to cool our brakes; get Maintenance to inspect our brakes/tires; and coordinate for a new maintenance release and Dispatch release while re-initializing our FMC. We accomplished all pre-flight; before push and before takeoff checklists again and accomplished an uneventful takeoff over an hour later and landing uneventfully in ZZZ1.


Synopsis: Air carrier flight crew reported a runway confliction resulted in an ATC directed high speed RTO. Captain also report a late ACARS message conflict.