Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument
Flight Crew Last 90 Days 210; Flight Crew Type 3693
Communication Breakdown; Confusion
ATC Issue All Types; Conflict Ground Conflict; Less Severe; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Requested ATC Assistance / Clarification
Procedure; Airport; Human Factors
Line up and wait on Runway 30. Parking brake set. First Officer has the flight controls. Captain has the radios. Cleared for takeoff. At about 60 knots; Dulles tower told someone [company but different callsign] to cancel takeoff clearance. No runway was stated. Another aircraft queried who that was for. At 80-90 knots; I thought I heard tower say '[our callsign]; cancel takeoff clearance'. I queried 'was that for [callsign]' just prior to the 100 knot call. A supervisor; with an older voice; came over the Tower frequency and said 'disregard '. The younger voice controller then came back on a couple of seconds later and told a [company] aircraft on final to 1C to go around. Prior to switching to departure frequency; I asked tower if they were talking to us to cancel takeoff clearance. The supervisor said 'don't worry about it.'
First Officer was Pilot Flying. Received takeoff clearance with 'no delay'. After power advanced to reduced take off power; I heard '[Company]; (not our call sign); cancel takeoff clearance'; Followed by a query for who was that for by another aircraft. Approaching 100kts; heard '[Company]; cancel takeoff clearance'; PM immediately queried 'Who was that for!?!?'; Tower Supervisor then responded with 'Disregard'; followed by [Company] flight XXX go around. This was a flight cleared to land on 01C while we were simultaneously cleared for takeoff on 30.Once airborne Captain queried controllers on if we were asked to stop takeoff roll. Response; 'Yes; but don't worry about it'.There was confusion in our cockpit as well as I think other aircraft as to who the call was made to.
Air carrier flight crew reported a communication breakdown with ATC in regard to a potential cancellation of takeoff clearance during takeoff roll.