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Air carrier Y climb through occupied altitude had less than standard separation from air carrier X. System error.
| Attributes | |
| ACN | 298471 |
| Time | |
| Date | 199502 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : vwv |
| State Reference | OH |
| Altitude | msl bound lower : 29000 msl bound upper : 29000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller non radar : 3 controller radar : 9 |
| ASRS Report | 298471 |
| 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 | none taken : insufficient time |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 21000 vertical : 100 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
I was working as radar controller at the sandusky high altitude sector of ZOB when air carrier X at FL290 nebound on J34 to crl yxv yyz passed 3.5 mi behind air carrier Y climbing through FL290 to FL310 wbound on J60. I had initially climbed Y to FL280 for the air carrier X traffic. Subsequently I climbed Y to FL310 with the intention of turning air carrier X to the right to go behind. Due to an oversight I failed to turn air carrier X and had an operational error. The conflict alert feature of my radar did not activate until separation was lost. There were no outside factors affecting my performance. I had a mental lapse or error that caused this.
Original NASA ASRS Text
Title: ACR Y CLB THROUGH OCCUPIED ALT HAD LTSS FROM ACR X. SYS ERROR.
Narrative: I WAS WORKING AS RADAR CTLR AT THE SANDUSKY HIGH ALT SECTOR OF ZOB WHEN ACR X AT FL290 NEBOUND ON J34 TO CRL YXV YYZ PASSED 3.5 MI BEHIND ACR Y CLBING THROUGH FL290 TO FL310 WBOUND ON J60. I HAD INITIALLY CLBED Y TO FL280 FOR THE ACR X TFC. SUBSEQUENTLY I CLBED Y TO FL310 WITH THE INTENTION OF TURNING ACR X TO THE R TO GO BEHIND. DUE TO AN OVERSIGHT I FAILED TO TURN ACR X AND HAD AN OPERATIONAL ERROR. THE CONFLICT ALERT FEATURE OF MY RADAR DID NOT ACTIVATE UNTIL SEPARATION WAS LOST. THERE WERE NO OUTSIDE FACTORS AFFECTING MY PERFORMANCE. I HAD A MENTAL LAPSE OR ERROR THAT CAUSED THIS.
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.