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ZOB ARTCC radar controller observes a traffic conflict between aircraft #1 and #2, but did not provide corrective action in time to prevent a loss of separation.
| Attributes | |
| ACN | 588507 |
| Time | |
| Date | 200307 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | navaid : fdy.vortac |
| State Reference | OH |
| Altitude | msl single value : 24000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob.artcc tower : zzz.tower |
| Operator | common carrier : air carrier |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : intermediate altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zob.artcc |
| Operator | general aviation : personal |
| Make Model Name | PA-31T Cheyenne II |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise : level |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : developmental |
| Experience | controller non radar : 3 controller radar : 6 |
| ASRS Report | 588507 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | conflict : airborne critical non adherence : required legal separation |
| Independent Detector | atc equipment : conflict alert atc equipment other atc equipment : radar / mode c other controllera other flight crewa other flight crewb |
| Resolutory Action | controller : issued new clearance flight crew : took evasive action |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 27000 vertical : 700 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Working the arrival push into cleveland. I knew aircraft #1 and #2 were traffic, because I needed to descend aircraft #1 as he was a cle arrival also. I thought I turned aircraft #1 enough for the descent. It wasn't.
Original NASA ASRS Text
Title: ZOB ARTCC RADAR CTLR OBSERVES A TFC CONFLICT BTWN ACFT #1 AND #2, BUT DID NOT PROVIDE CORRECTIVE ACTION IN TIME TO PREVENT A LOSS OF SEPARATION.
Narrative: WORKING THE ARR PUSH INTO CLEVELAND. I KNEW ACFT #1 AND #2 WERE TFC, BECAUSE I NEEDED TO DSND ACFT #1 AS HE WAS A CLE ARR ALSO. I THOUGHT I TURNED ACFT #1 ENOUGH FOR THE DSCNT. IT WASN'T.
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.