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ZKC controller experienced operational error between an aircraft level at FL370 and climbing aircraft; inadvertently assigned same altitude; TCAS/RA received by level aircraft.
| Attributes | |
| ACN | 814182 |
| Time | |
| Date | 200811 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : zkc.artcc |
| Altitude | msl single value : 37000 |
| Aircraft 1 | |
| Controlling Facilities | artcc : zkc.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B757 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zkc.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | EMB ERJ 170/175 ER&LR |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 20 controller time certified in position1 : 19 |
| ASRS Report | 814182 |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | atc equipment : conflict alert aircraft equipment : tcas other controllera |
| Resolutory Action | controller : issued alert controller : issued new clearance |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 14000 vertical : 300 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Aircraft Y was in level flight at FL370 to ord. Aircraft X was climbing. I meant to assign aircraft X their requested altitude FL360; but instead assigned FL370. When aircraft X climbed through FL360; aircraft Y advised they were responding to a TCAS RA. I questioned aircraft X on their altitude and issued a descent to both aircraft when they were clear of each other. I have no recommendation on ways to avoid this situation and no idea what caused this mistake. I was working alone at the time and there were no distrs in my area.
Original NASA ASRS Text
Title: ZKC CONTROLLER EXPERIENCED OPERATIONAL ERROR BETWEEN AN AIRCRAFT LEVEL AT FL370 AND CLIMBING AIRCRAFT; INADVERTENTLY ASSIGNED SAME ALTITUDE; TCAS/RA RECEIVED BY LEVEL AIRCRAFT.
Narrative: ACFT Y WAS IN LEVEL FLT AT FL370 TO ORD. ACFT X WAS CLBING. I MEANT TO ASSIGN ACFT X THEIR REQUESTED ALT FL360; BUT INSTEAD ASSIGNED FL370. WHEN ACFT X CLBED THROUGH FL360; ACFT Y ADVISED THEY WERE RESPONDING TO A TCAS RA. I QUESTIONED ACFT X ON THEIR ALT AND ISSUED A DSCNT TO BOTH ACFT WHEN THEY WERE CLEAR OF EACH OTHER. I HAVE NO RECOMMENDATION ON WAYS TO AVOID THIS SITUATION AND NO IDEA WHAT CAUSED THIS MISTAKE. I WAS WORKING ALONE AT THE TIME AND THERE WERE NO DISTRS IN MY AREA.
Data retrieved from NASA's ASRS site as of May 2009 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.