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A ZID ARTCC radar controller descended a crj to 9000 ft causing a conflict with an E145 level at 11000 ft.
| Attributes | |
| ACN | 631221 |
| Time | |
| Date | 200409 |
| Day | Sat |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | navaid : tvt.vor |
| State Reference | OH |
| Altitude | msl bound lower : 9000 msl bound upper : 11400 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zid.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Regional Jet 200 ER&LR |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : intermediate altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zid.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | EMB ERJ 145 ER&LR |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 9 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | conflict : airborne critical non adherence : required legal separation non adherence : published procedure |
| Independent Detector | atc equipment other atc equipment : radar/mode c other controllera other flight crewa other flight crewb |
| Resolutory Action | controller : issued new clearance |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 26400 vertical : 600 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
CRJ2 was inbound to cak, E145 was in level flight inbound to cle. CRJ2 slowed their airspeed descending to 9000 ft, creating confliction with E145. I attempted to descend the CRJ2 through the E145's altitude, but eventually tried to stop the CRJ2 above the E145 without success. I did not take into account the CRJ2 reducing speed for their descent when issuing descent clearance.
Original NASA ASRS Text
Title: A ZID ARTCC RADAR CTLR DSNDED A CRJ TO 9000 FT CAUSING A CONFLICT WITH AN E145 LEVEL AT 11000 FT.
Narrative: CRJ2 WAS INBOUND TO CAK, E145 WAS IN LEVEL FLT INBOUND TO CLE. CRJ2 SLOWED THEIR AIRSPD DSNDING TO 9000 FT, CREATING CONFLICTION WITH E145. I ATTEMPTED TO DSND THE CRJ2 THROUGH THE E145'S ALT, BUT EVENTUALLY TRIED TO STOP THE CRJ2 ABOVE THE E145 WITHOUT SUCCESS. I DID NOT TAKE INTO ACCOUNT THE CRJ2 REDUCING SPD FOR THEIR DSCNT WHEN ISSUING DSCNT CLRNC.
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.