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ZOB controller; distraction by a SIGMET review; failed to issue timely turn instructions and lost required separation at FL210.
| Attributes | |
| ACN | 660565 |
| Time | |
| Date | 200506 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | navaid : dxo.vor |
| State Reference | MI |
| Altitude | msl single value : 21000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Regional Jet CL65 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zob.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | DC-9 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : ground |
| Qualification | controller : radar |
| Experience | controller radar : 18 |
| ASRS Report | 660565 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | atc equipment : conflict alert other controllera |
| Resolutory Action | controller : issued alert controller : issued new clearance |
| Miss Distance | horizontal : 25200 vertical : 300 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | Company |
| Air Traffic Incident | Operational Error |
Narrative:
Both aircraft were climbing northbound. The DC9 in back climbed faster; so at FL210 (his requested) I turned him 30 degrees right; planning on paralleling the crj who was due to turn right in about 10 mi. I told both aircraft to resume normal speed. I then called cyyz to coordination the DC9 at FL210; then saw I had 3 sigmets. I started looking through them and realized I hadn't turned the back aircraft like I had planned. The crj made his turn out of FL202; so I turned the FL210 traffic further right and had the high altitude sector turn the crj to the left. It was just done a little too late.
Original NASA ASRS Text
Title: ZOB CTLR; DISTR BY A SIGMET REVIEW; FAILED TO ISSUE TIMELY TURN INSTRUCTIONS AND LOST REQUIRED SEPARATION AT FL210.
Narrative: BOTH ACFT WERE CLBING NBOUND. THE DC9 IN BACK CLBED FASTER; SO AT FL210 (HIS REQUESTED) I TURNED HIM 30 DEGS R; PLANNING ON PARALLELING THE CRJ WHO WAS DUE TO TURN R IN ABOUT 10 MI. I TOLD BOTH ACFT TO RESUME NORMAL SPD. I THEN CALLED CYYZ TO COORD THE DC9 AT FL210; THEN SAW I HAD 3 SIGMETS. I STARTED LOOKING THROUGH THEM AND REALIZED I HADN'T TURNED THE BACK ACFT LIKE I HAD PLANNED. THE CRJ MADE HIS TURN OUT OF FL202; SO I TURNED THE FL210 TFC FURTHER R AND HAD THE HIGH ALT SECTOR TURN THE CRJ TO THE L. IT WAS JUST DONE A LITTLE TOO LATE.
Data retrieved from NASA's ASRS site as of January 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.