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Aircraft was turned after departure into a previous released aircraft resulting in less than standard separation.
| Attributes | |
| ACN | 107439 |
| Time | |
| Date | 198903 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : ord |
| State Reference | IL |
| Altitude | msl bound lower : 3000 msl bound upper : 6000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : ord |
| Operator | general aviation : corporate |
| Make Model Name | Small Transport, Low Wing, 2 Turboprop Eng |
| Flight Phase | climbout : initial |
| Route In Use | departure other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | climbout : initial |
| Route In Use | departure other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : departure |
| Qualification | controller : radar |
| ASRS Report | 107439 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | non adherence : published procedure non adherence : required legal separation |
| Independent Detector | other controllera |
| Resolutory Action | none taken : detected after the fact |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 12000 vertical : 500 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Aircraft 2 departure runway 27L with a right turn heading 320 degrees. Aircraft 1 departure runway 27R with instructions to fly runway heading. Aircraft 2 was well north of runway 27R at this time. Approximately 1/2 mi west of the airport, aircraft 1 was turned to a 340 degree heading. 5 mi northwest of the airport aircraft 1 and 2 crossed with less than standard separation. Aircraft 1 was originally first out. I wrote 340 degrees on the strip. The situation changed and aircraft 2 departed first. Aircraft 1 should have then been issued a 300 degree heading, but in my hurry I neglected to change the strip marking and when I turned him I just read what I had already written.
Original NASA ASRS Text
Title: ACFT WAS TURNED AFTER DEP INTO A PREVIOUS RELEASED ACFT RESULTING IN LESS THAN STANDARD SEPARATION.
Narrative: ACFT 2 DEP RWY 27L WITH A RIGHT TURN HDG 320 DEGS. ACFT 1 DEP RWY 27R WITH INSTRUCTIONS TO FLY RWY HDG. ACFT 2 WAS WELL N OF RWY 27R AT THIS TIME. APPROX 1/2 MI W OF THE ARPT, ACFT 1 WAS TURNED TO A 340 DEG HDG. 5 MI NW OF THE ARPT ACFT 1 AND 2 CROSSED WITH LTSS. ACFT 1 WAS ORIGINALLY FIRST OUT. I WROTE 340 DEGS ON THE STRIP. THE SITUATION CHANGED AND ACFT 2 DEPARTED FIRST. ACFT 1 SHOULD HAVE THEN BEEN ISSUED A 300 DEG HDG, BUT IN MY HURRY I NEGLECTED TO CHANGE THE STRIP MARKING AND WHEN I TURNED HIM I JUST READ WHAT I HAD ALREADY WRITTEN.
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.