Mco local controller clears aircraft X for takeoff but then mistakenly uses aircraft X call sign to instruct aircraft Y into position and hold. Aircraft X aborted.

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Attributes
ACN	446320
Time
Date	199908
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : mco.airport
State Reference	FL
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B757 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	ground : takeoff roll
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tower : mco.tower
Operator	common carrier : air carrier
Operating Under FAR Part	Part 121
Flight Phase	ground : holding
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 80 flight time total : 14900 flight time type : 50
ASRS Report	446320
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial pilot : multi engine
Events
Anomaly	non adherence : published procedure
Independent Detector	other flight crewa other flight crewb
Resolutory Action	flight crew : rejected takeoff none taken : detected after the fact
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	ATC Human Performance

Narrative:

Orlando tower had cleared us for takeoff. Just as we were advancing the power, we heard the tower clear 'air carrier abc' into position and hold. Since this was our call sign, apparently some confusion existed. Although we suspect the tower had just misspoke, we elected to discontinue the takeoff at taxi speed. Additionally we queried the controller and advised him we were discontinuing our takeoff and would exit at the next taxiway. The controller admittedly used the wrong call sign by accident. He apologized several times for the confusion. All procedures/checklists were accomplished/reaccomplished and the flight departed uneventfully. This was just one of those times (that we have all experienced) where the wrong call sign was accidentally/momentarily used. During any other phase of flight a radio call could have quickly cleared up the confusion, but since the time factor involved was more critical we elected to discontinue the takeoff.

Original NASA ASRS Text

Title: MCO LCL CTLR CLRS ACFT X FOR TKOF BUT THEN MISTAKENLY USES ACFT X CALL SIGN TO INSTRUCT ACFT Y INTO POS AND HOLD. ACFT X ABORTED.

Narrative: ORLANDO TWR HAD CLRED US FOR TKOF. JUST AS WE WERE ADVANCING THE PWR, WE HEARD THE TWR CLR 'ACR ABC' INTO POS AND HOLD. SINCE THIS WAS OUR CALL SIGN, APPARENTLY SOME CONFUSION EXISTED. ALTHOUGH WE SUSPECT THE TWR HAD JUST MISSPOKE, WE ELECTED TO DISCONTINUE THE TKOF AT TAXI SPD. ADDITIONALLY WE QUERIED THE CTLR AND ADVISED HIM WE WERE DISCONTINUING OUR TKOF AND WOULD EXIT AT THE NEXT TXWY. THE CTLR ADMITTEDLY USED THE WRONG CALL SIGN BY ACCIDENT. HE APOLOGIZED SEVERAL TIMES FOR THE CONFUSION. ALL PROCS/CHKLISTS WERE ACCOMPLISHED/REACCOMPLISHED AND THE FLT DEPARTED UNEVENTFULLY. THIS WAS JUST ONE OF THOSE TIMES (THAT WE HAVE ALL EXPERIENCED) WHERE THE WRONG CALL SIGN WAS ACCIDENTALLY/MOMENTARILY USED. DURING ANY OTHER PHASE OF FLT A RADIO CALL COULD HAVE QUICKLY CLRED UP THE CONFUSION, BUT SINCE THE TIME FACTOR INVOLVED WAS MORE CRITICAL WE ELECTED TO DISCONTINUE THE TKOF.

Data retrieved from NASA's ASRS site as of July 2007 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.