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ARTCC radar controller descended an aircraft into another aircraft which resulted in loss of altitude separation.
| Attributes | |
| ACN | 159382 |
| Time | |
| Date | 199010 |
| Day | Mon |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : stl |
| State Reference | MO |
| Altitude | msl bound lower : 33000 msl bound upper : 34600 |
| Environment | |
| Flight Conditions | IMC |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | artcc : zkc |
| Operator | common carrier : air carrier |
| Make Model Name | Widebody, Low Wing, 3 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Light Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | descent other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| ASRS Report | 159382 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure non adherence : required legal separation |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | faa : investigated |
| Miss Distance | vertical : 1600 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
I was working sector 16 at ZKC. I descended an aircraft that was descending to FL350 from super high widebody transport was nebnd at FL330. I had to cross ZAU's boundary at FL270 so was going to descend light transport to FL330, go over the top of FL310 traffic on J80 so when aircraft came over on frequency I descended light transport to FL330 then realized that widebody transport was under him at FL330. I then climbed light transport back to FL350. Aircraft said that he had to descend before he could climb. At FL346 sep did not exist.
Original NASA ASRS Text
Title: ARTCC RADAR CTLR DESCENDED AN ACFT INTO ANOTHER ACFT WHICH RESULTED IN LOSS OF ALT SEPARATION.
Narrative: I WAS WORKING SECTOR 16 AT ZKC. I DSNDED AN ACFT THAT WAS DSNDING TO FL350 FROM SUPER HIGH WDB WAS NEBND AT FL330. I HAD TO CROSS ZAU'S BOUNDARY AT FL270 SO WAS GOING TO DSND LTT TO FL330, GO OVER THE TOP OF FL310 TFC ON J80 SO WHEN ACFT CAME OVER ON FREQ I DSNDED LTT TO FL330 THEN REALIZED THAT WDB WAS UNDER HIM AT FL330. I THEN CLBED LTT BACK TO FL350. ACFT SAID THAT HE HAD TO DSND BEFORE HE COULD CLB. AT FL346 SEP DID NOT EXIST.
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.