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Air carrier Y climb through occupied altitude had less than standard separation from air carrier X. System error.
| Attributes | |
| ACN | 278357 |
| Time | |
| Date | 199407 |
| Day | Sat |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : mzv |
| State Reference | IL |
| Altitude | msl bound lower : 35000 msl bound upper : 35000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zau |
| Operator | common carrier : air carrier |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | general aviation : corporate |
| Make Model Name | Light Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | cruise other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| ASRS Report | 278357 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation non adherence : published procedure |
| Independent Detector | other controllera |
| Resolutory Action | none taken : detected after the fact |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 18000 vertical : 0 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Intra Facility Coordination Failure Operational Error |
Narrative:
I was working bdf hi and lowli hi sectors combined. Supervisor decided to split sectors. During briefing with controller opening lowli sector air carrier X was not flashed or pvd onto lowli sector scope by me, nor was he mentioned in briefing. Flight strip for air carrier X was given to right controller at lowli sector by manual controller at baf hi. Controller at lowli sector stated he had airspace and frequencys for split off. I was relieved on radar by manual controller who was working bdf- D side. Shortly after lowli controller climb cpr Y into air carrier X, air carrier X was shipped to lowli frequency 25 to 3 min prior to error. Did not check on although air carrier X did acknowledge traffic seconds after the fact.
Original NASA ASRS Text
Title: ACR Y CLB THROUGH OCCUPIED ALT HAD LTSS FROM ACR X. SYS ERROR.
Narrative: I WAS WORKING BDF HI AND LOWLI HI SECTORS COMBINED. SUPVR DECIDED TO SPLIT SECTORS. DURING BRIEFING WITH CTLR OPENING LOWLI SECTOR ACR X WAS NOT FLASHED OR PVD ONTO LOWLI SECTOR SCOPE BY ME, NOR WAS HE MENTIONED IN BRIEFING. FLT STRIP FOR ACR X WAS GIVEN TO R CTLR AT LOWLI SECTOR BY MANUAL CTLR AT BAF HI. CTLR AT LOWLI SECTOR STATED HE HAD AIRSPACE AND FREQS FOR SPLIT OFF. I WAS RELIEVED ON RADAR BY MANUAL CTLR WHO WAS WORKING BDF- D SIDE. SHORTLY AFTER LOWLI CTLR CLB CPR Y INTO ACR X, ACR X WAS SHIPPED TO LOWLI FREQ 25 TO 3 MIN PRIOR TO ERROR. DID NOT CHK ON ALTHOUGH ACR X DID ACKNOWLEDGE TFC SECONDS AFTER THE FACT.
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.