Narrative:

From a static takeoff at the takeoff position tower cleared us for takeoff. At approximately 50 KTS and abeam taxiway M tower transmitted 'air carrier X cancel your takeoff clearance.' captain (pilot monitoring) transmitted; 'negative; we've begun our takeoff roll.' tower then directs an air carrier Y rj on about a 2 mi final for crossing runway to go around. On departure tower directed us to contact them regarding 'possible pilot deviation.' pilots of air carrier X contend that takeoff roll was commenced (takeoff maneuver was in progress); if tower wanted us to 'abort' takeoff; that command should have been issued for that phase of 'flight.' takeoff clearance was given and received and commenced. A safety of flight issue was a concern whereas we were approaching the speed at which the rejected takeoff feature would activate at throttle reduction. It should be noted we were within approximately 8000 pounds of our maximum allowable takeoff weight. This is a flight operations issue versus controller timing of a landing clearance given for traffic on crossing runway and takeoff clearance our runway. Pilots of air carrier X flight did have the traffic in sight. Visibility was unlimited. Supplemental information from acn 802888: I set takeoff power; takeoff roll commenced. Shortly into takeoff roll; the same tower controller states' air carrier X takeoff clearance canceled.' captain responds 'negative we've begun our takeoff roll;' I had reduced power slightly awaiting the captain's input and he indicated to continue the takeoff. Full power reestablished and takeoff continued.

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Original NASA ASRS Text

Title: ACR ON TKOF ROLL ELECTS NOT TO COMPLY WITH TWR CLRNC TO CANCEL TKOF CLRNC; XING RWY ARR IS ISSUED GAR.

Narrative: FROM A STATIC TKOF AT THE TKOF POS TWR CLRED US FOR TKOF. AT APPROX 50 KTS AND ABEAM TXWY M TWR XMITTED 'ACR X CANCEL YOUR TKOF CLRNC.' CAPT (PLT MONITORING) XMITTED; 'NEGATIVE; WE'VE BEGUN OUR TKOF ROLL.' TWR THEN DIRECTS AN ACR Y RJ ON ABOUT A 2 MI FINAL FOR XING RWY TO GO AROUND. ON DEP TWR DIRECTED US TO CONTACT THEM REGARDING 'POSSIBLE PLTDEV.' PLTS OF ACR X CONTEND THAT TKOF ROLL WAS COMMENCED (TKOF MANEUVER WAS IN PROGRESS); IF TWR WANTED US TO 'ABORT' TKOF; THAT COMMAND SHOULD HAVE BEEN ISSUED FOR THAT PHASE OF 'FLT.' TKOF CLRNC WAS GIVEN AND RECEIVED AND COMMENCED. A SAFETY OF FLT ISSUE WAS A CONCERN WHEREAS WE WERE APCHING THE SPD AT WHICH THE RTO FEATURE WOULD ACTIVATE AT THROTTLE REDUCTION. IT SHOULD BE NOTED WE WERE WITHIN APPROX 8000 LBS OF OUR MAX ALLOWABLE TKOF WT. THIS IS A FLT OPS ISSUE VERSUS CTLR TIMING OF A LNDG CLRNC GIVEN FOR TFC ON XING RWY AND TKOF CLRNC OUR RWY. PLTS OF ACR X FLT DID HAVE THE TFC IN SIGHT. VISIBILITY WAS UNLIMITED. SUPPLEMENTAL INFO FROM ACN 802888: I SET TKOF PWR; TKOF ROLL COMMENCED. SHORTLY INTO TKOF ROLL; THE SAME TWR CTLR STATES' ACR X TKOF CLRNC CANCELED.' CAPT RESPONDS 'NEGATIVE WE'VE BEGUN OUR TKOF ROLL;' I HAD REDUCED PWR SLIGHTLY AWAITING THE CAPT'S INPUT AND HE INDICATED TO CONTINUE THE TKOF. FULL PWR REESTABLISHED AND TKOF CONTINUED.

Data retrieved from NASA's ASRS site as of May 2009 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.