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Aircraft with similar sounding call signs inadvertently issued a climb and came in close proximity to a widebody transport.
| Attributes | |
| ACN | 107000 |
| Time | |
| Date | 198903 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : ord |
| State Reference | IL |
| Altitude | msl bound lower : 5000 msl bound upper : 6000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | tracon : ord |
| Operator | common carrier : air carrier |
| Make Model Name | Widebody, Low Wing, 3 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Light Transport, High Wing, 2 Turboprop Eng |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : departure |
| Qualification | controller : radar |
| ASRS Report | 107000 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation non adherence : published procedure other anomaly other |
| Independent Detector | atc equipment other atc equipment : unspecified other controllera |
| Resolutory Action | controller : issued new clearance |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 18000 vertical : 0 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
On 3/xx/89, I was working ord southwest departure control in the ord TRACON. WX was VFR, arrival runway's were 27L/27R/32L. Light transport Z departed ord heading 180 degrees climbing to 5000'. Light transport Y departed ord heading 220 degrees climbing to 5000'. Air carrier X departed ord heading 240 degrees climbing to 5000'. Air carrier X was climbed to 6000' to go over the top of light transport Y. I inadvertently climbed light transport Y to 8000', it should have been light transport Z. After making a pointout to chicago center, it was brought to my attention that light transport Y was climbing above 5000'. Light transport Y was descended back to 50' and traffic was called to air carrier X. Air carrier X called the traffic in sight and visibility sep was issued to air carrier X. Similar call signs was factor in this situation. Prevention of this situation would be not using similar call signs at the same flight times from the same airport.
Original NASA ASRS Text
Title: ACFT WITH SIMILAR SOUNDING CALL SIGNS INADVERTENTLY ISSUED A CLIMB AND CAME IN CLOSE PROX TO A WDB.
Narrative: ON 3/XX/89, I WAS WORKING ORD SW DEP CTL IN THE ORD TRACON. WX WAS VFR, ARR RWY'S WERE 27L/27R/32L. LTT Z DEPARTED ORD HDG 180 DEGS CLBING TO 5000'. LTT Y DEPARTED ORD HDG 220 DEGS CLBING TO 5000'. ACR X DEPARTED ORD HDG 240 DEGS CLBING TO 5000'. ACR X WAS CLBED TO 6000' TO GO OVER THE TOP OF LTT Y. I INADVERTENTLY CLBED LTT Y TO 8000', IT SHOULD HAVE BEEN LTT Z. AFTER MAKING A POINTOUT TO CHICAGO CENTER, IT WAS BROUGHT TO MY ATTN THAT LTT Y WAS CLBING ABOVE 5000'. LTT Y WAS DSNDED BACK TO 50' AND TFC WAS CALLED TO ACR X. ACR X CALLED THE TFC IN SIGHT AND VIS SEP WAS ISSUED TO ACR X. SIMILAR CALL SIGNS WAS FACTOR IN THIS SITUATION. PREVENTION OF THIS SITUATION WOULD BE NOT USING SIMILAR CALL SIGNS AT THE SAME FLT TIMES FROM THE SAME ARPT.
Data retrieved from NASA's ASRS site as of August 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.