Narrative:

The incident of a near miss or operational error occurred on the dates and times above were caused while I was working the tower position at O'hare tower. During a period of moderate traffic (departing 9L and 32L) I mistakenly gave a heading to the incorrect company airlines flight. By giving control instructions to the incorrect flight, I caused a flight (air carrier X) to pass over an aircraft on the 9R final approach course. The problem was discovered when the pilot questioned the assigned heading. I quickly took evasive action and turned air carrier X from further conflicts. What contributed to the incorrect call sign was a report from another controller of a missed approach heading for my airspace. I was in the process of sending air carrier X to departure control when the other controller yelled in the cabin attendant 'going around 4 right.' in the midst of my transmission to ship air carrier X to departure, I instead turned him to a heading 090 (he was already on a 330) thinking he was the company flight also airborne off of 9L. (The one I really needed to talk to about the miss approach). To prevent a recurrence I would suggest that to myself I pause to consider the missed approach and not react too quickly especially if not necessary. Also possibly more standardization of missed approachs at O'hare.

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Original NASA ASRS Text

Title: CTLR VECTORS WRONG ACFT AFTER DEP AND CONFLICTS WITH AN ARR ACR RESULTING IN LTSS.

Narrative: THE INCIDENT OF A NEAR MISS OR OPERATIONAL ERROR OCCURRED ON THE DATES AND TIMES ABOVE WERE CAUSED WHILE I WAS WORKING THE TWR POS AT O'HARE TWR. DURING A PERIOD OF MODERATE TFC (DEPARTING 9L AND 32L) I MISTAKENLY GAVE A HDG TO THE INCORRECT COMPANY AIRLINES FLT. BY GIVING CTL INSTRUCTIONS TO THE INCORRECT FLT, I CAUSED A FLT (ACR X) TO PASS OVER AN ACFT ON THE 9R FINAL APCH COURSE. THE PROBLEM WAS DISCOVERED WHEN THE PLT QUESTIONED THE ASSIGNED HDG. I QUICKLY TOOK EVASIVE ACTION AND TURNED ACR X FROM FURTHER CONFLICTS. WHAT CONTRIBUTED TO THE INCORRECT CALL SIGN WAS A RPT FROM ANOTHER CTLR OF A MISSED APCH HDG FOR MY AIRSPACE. I WAS IN THE PROCESS OF SENDING ACR X TO DEP CTL WHEN THE OTHER CTLR YELLED IN THE CAB 'GOING AROUND 4 R.' IN THE MIDST OF MY XMISSION TO SHIP ACR X TO DEP, I INSTEAD TURNED HIM TO A HDG 090 (HE WAS ALREADY ON A 330) THINKING HE WAS THE COMPANY FLT ALSO AIRBORNE OFF OF 9L. (THE ONE I REALLY NEEDED TO TALK TO ABOUT THE MISS APCH). TO PREVENT A RECURRENCE I WOULD SUGGEST THAT TO MYSELF I PAUSE TO CONSIDER THE MISSED APCH AND NOT REACT TOO QUICKLY ESPECIALLY IF NOT NECESSARY. ALSO POSSIBLY MORE STANDARDIZATION OF MISSED APCHS AT O'HARE.

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.