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Center controller had less than standard separation between large transport climbing and light transport descending. Poor ATC coordination.
| Attributes | |
| ACN | 84537 |
| Time | |
| Date | 198803 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : cgt |
| State Reference | IL |
| Altitude | msl bound lower : 17900 msl bound upper : 18000 |
| Environment | |
| Flight Conditions | Marginal |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zau |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute airway : zau |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | general aviation : corporate |
| Make Model Name | Light Transport |
| Flight Phase | descent other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller non radar : 3 controller radar : 2 |
| ASRS Report | 84537 |
| Person 2 | |
| Function | controller : radar |
| Qualification | controller : radar |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation other anomaly other |
| Independent Detector | atc equipment other atc equipment : unspecified other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Miss Distance | horizontal : 25800 vertical : 100 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error Intra Facility Coordination Failure |
Narrative:
I was taking the whett departure sector over from the cgt controller when large transport X departed ord. Before I arrived the cgt controller had taken a point out on light transport Y wbound descending through the sector to 17000'. He then forced the data block down and never advised me of the point out. I climbed the departure to FL230. A third party then advised me of light transport Y and I turned large transport X left to a 090 heading. The turn was not enough to maintain 5 mi sep.
Original NASA ASRS Text
Title: CENTER CTLR HAD LESS THAN STANDARD SEPARATION BETWEEN LGT CLIMBING AND LTT DESCENDING. POOR ATC COORD.
Narrative: I WAS TAKING THE WHETT DEP SECTOR OVER FROM THE CGT CTLR WHEN LGT X DEPARTED ORD. BEFORE I ARRIVED THE CGT CTLR HAD TAKEN A POINT OUT ON LTT Y WBOUND DSNDING THROUGH THE SECTOR TO 17000'. HE THEN FORCED THE DATA BLOCK DOWN AND NEVER ADVISED ME OF THE POINT OUT. I CLBED THE DEP TO FL230. A THIRD PARTY THEN ADVISED ME OF LTT Y AND I TURNED LGT X LEFT TO A 090 HDG. THE TURN WAS NOT ENOUGH TO MAINTAIN 5 MI SEP.
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.