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Air carrier X climb to occupied altitude had less than standard separation from air carrier Z. System error.
| Attributes | |
| ACN | 211420 |
| Time | |
| Date | 199205 |
| Day | Sat |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : zob |
| State Reference | OH |
| Altitude | msl bound lower : 28000 msl bound upper : 29000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob |
| 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 | common carrier : air carrier |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | cruise other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller non radar : 6 controller radar : 4 |
| ASRS Report | 211420 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation non adherence : published procedure |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 21000 vertical : 300 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Inter Facility Coordination Failure Operational Error |
Narrative:
Both air carrier X and air carrier Y were nebound climbing to FL290. Air carrier Z was at FL290 northbound at FL290 which was going to be descended under the 2 climbing aircraft. Next sector said just stop them under air carrier Z. I said ok and stopped air carrier Y and before I could stop air carrier X, my override had a call on 2 then another aircraft called me. Had to call air carrier Z a couple of times before he would answer. By this time, I neglected to get back and stop air carrier X which already showed climbing to FL280 which the next sector put in. Everything looked ok until I saw him bust his altitude and by the time I had got him level again it was too late. I realized then that I had not gotten back to stop air carrier X at FL280.
Original NASA ASRS Text
Title: ACR X CLB TO OCCUPIED ALT HAD LTSS FROM ACR Z. SYS ERROR.
Narrative: BOTH ACR X AND ACR Y WERE NEBOUND CLBING TO FL290. ACR Z WAS AT FL290 NBOUND AT FL290 WHICH WAS GOING TO BE DSNDED UNDER THE 2 CLBING ACFT. NEXT SECTOR SAID JUST STOP THEM UNDER ACR Z. I SAID OK AND STOPPED ACR Y AND BEFORE I COULD STOP ACR X, MY OVERRIDE HAD A CALL ON 2 THEN ANOTHER ACFT CALLED ME. HAD TO CALL ACR Z A COUPLE OF TIMES BEFORE HE WOULD ANSWER. BY THIS TIME, I NEGLECTED TO GET BACK AND STOP ACR X WHICH ALREADY SHOWED CLBING TO FL280 WHICH THE NEXT SECTOR PUT IN. EVERYTHING LOOKED OK UNTIL I SAW HIM BUST HIS ALT AND BY THE TIME I HAD GOT HIM LEVEL AGAIN IT WAS TOO LATE. I REALIZED THEN THAT I HAD NOT GOTTEN BACK TO STOP ACR X AT FL280.
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.