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Air carrier Y climb through occupied altitude had less than standard separation from air carrier X. System error.
| Attributes | |
| ACN | 265671 |
| Time | |
| Date | 199403 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : obk |
| State Reference | IL |
| Altitude | msl bound lower : 19000 msl bound upper : 19000 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zau |
| 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 : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller military : 4 controller radar : 1 |
| ASRS Report | 265671 |
| 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 other : unspecified atc |
| Resolutory Action | none taken : detected after the fact |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 24000 vertical : 300 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error Intra Facility Coordination Failure |
Narrative:
While working the harley sector in ZAU, air carrier X departed mke sbound. X called me and I told the pilot to climb to 16000 ft for traffic at 17000 ft. After the traffic was no longer a factor, I climbed X to FL190. Then air carrier off mke sbound, and mke approach called requesting higher. I approved climb to FL180. I then called mke approach back and told the controller to amend Y's altitude to 16000 ft. Y called me and climbed the aircraft to FL180 on a 220 degree heading, with the intent to continue Y climb to FL230 once I got lateral separation with X. I pointed Y out to the eon sector controller climbing high sbound. I shipped X to eon, then shipped the Y to the jot sector controller without climbing the aircraft to FL230. The jot sector controller called me requesting control of Y because I forgot to climb Y to FL230. Once the jot sector controller climbed Y, the deal occurred.
Original NASA ASRS Text
Title: ACR Y CLB THROUGH OCCUPIED ALT HAD LTSS FROM ACR X. SYS ERROR.
Narrative: WHILE WORKING THE HARLEY SECTOR IN ZAU, ACR X DEPARTED MKE SBOUND. X CALLED ME AND I TOLD THE PLT TO CLB TO 16000 FT FOR TFC AT 17000 FT. AFTER THE TFC WAS NO LONGER A FACTOR, I CLBED X TO FL190. THEN ACR OFF MKE SBOUND, AND MKE APCH CALLED REQUESTING HIGHER. I APPROVED CLB TO FL180. I THEN CALLED MKE APCH BACK AND TOLD THE CTLR TO AMEND Y'S ALT TO 16000 FT. Y CALLED ME AND CLBED THE ACFT TO FL180 ON A 220 DEG HDG, WITH THE INTENT TO CONTINUE Y CLB TO FL230 ONCE I GOT LATERAL SEPARATION WITH X. I POINTED Y OUT TO THE EON SECTOR CTLR CLBING HIGH SBOUND. I SHIPPED X TO EON, THEN SHIPPED THE Y TO THE JOT SECTOR CTLR WITHOUT CLBING THE ACFT TO FL230. THE JOT SECTOR CTLR CALLED ME REQUESTING CTL OF Y BECAUSE I FORGOT TO CLB Y TO FL230. ONCE THE JOT SECTOR CTLR CLBED Y, THE DEAL OCCURRED.
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.