Air carrier flight crew reported a communication breakdown with ATC in regard to a potential cancell...

Attributes
ACN	1587201
Time
Date	201810
Local Time Of Day	1201-1800
Place
Locale Reference	IAD.Airport
State Reference	DC
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	Takeoff
Flight Plan	IFR
Person 1
Function	Captain Pilot Not Flying
Qualification	Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument
Experience	Flight Crew Last 90 Days 210 Flight Crew Type 3693
Person 2
Function	Pilot Flying First Officer
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 382
Events
Anomaly	ATC Issue All Types Conflict Ground Conflict Less Severe Deviation - Procedural Published Material / Policy

Narrative:

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.'

Original NASA ASRS Text

Title: Air carrier flight crew reported a communication breakdown with ATC in regard to a potential cancellation of takeoff clearance during takeoff roll.

Narrative: 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.'

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.