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ZID controller experienced operational error at 16000 when control actions to separate crossing traffic was insufficient.
| Attributes | |
| ACN | 771779 |
| Time | |
| Date | 200801 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : zid.artcc |
| State Reference | IN |
| Altitude | msl single value : 16000 |
| Environment | |
| Flight Conditions | Mixed |
| Weather Elements | Ice Turbulence |
| Light | Dusk |
| 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 | general aviation : personal |
| Make Model Name | Super King Air 200 HDC |
| 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 : radar |
| Experience | controller limited radar : 7 controller military : 9 controller non radar : 9 controller radar : 19 controller supervisory : 4 controller time certified in position1 : 6 |
| ASRS Report | 771779 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : military controller : radar |
| Experience | controller military : 5 controller radar : 2 controller time certified in position1 : 3 |
| ASRS Report | 771831 |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | atc equipment : conflict alert other controllera |
| Resolutory Action | controller : issued new clearance controller : issued alert |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 18300 vertical : 800 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
CRJ2 was given a crossing that was thought to be sufficient to ensure separation below the BE20. A turn was issued to the BE20 and altitude report was received from the CRJ2. Neither was quite enough to ensure standard separation; only to keep them from an unsafe proximity. Supplemental information from acn 771831: as radar associate controller; at approximately XA56; I noticed a possible conflict between aircraft 1 and aircraft 2. I notified the radar training team and the radar trainer acknowledged. Conflict alert activated approximately XA57. At approximately XB00; separation was lost after instructing aircraft X to report leaving 15000 ft and a heading of 270 degrees was issued to aircraft Y. In my opinion; the radar trainer simply misjudged the location of the fix crossing. Both the radar trainer and developmental handled the situation professionally; and safety was not compromised.
Original NASA ASRS Text
Title: ZID CTLR EXPERIENCED OPERROR AT 16000 WHEN CTL ACTIONS TO SEPARATE CROSSING TFC WAS INSUFFICIENT.
Narrative: CRJ2 WAS GIVEN A XING THAT WAS THOUGHT TO BE SUFFICIENT TO ENSURE SEPARATION BELOW THE BE20. A TURN WAS ISSUED TO THE BE20 AND ALT RPT WAS RECEIVED FROM THE CRJ2. NEITHER WAS QUITE ENOUGH TO ENSURE STANDARD SEPARATION; ONLY TO KEEP THEM FROM AN UNSAFE PROX. SUPPLEMENTAL INFO FROM ACN 771831: AS RADAR ASSOCIATE CTLR; AT APPROX XA56; I NOTICED A POSSIBLE CONFLICT BTWN ACFT 1 AND ACFT 2. I NOTIFIED THE RADAR TRAINING TEAM AND THE RADAR TRAINER ACKNOWLEDGED. CONFLICT ALERT ACTIVATED APPROX XA57. AT APPROX XB00; SEPARATION WAS LOST AFTER INSTRUCTING ACFT X TO RPT LEAVING 15000 FT AND A HDG OF 270 DEGS WAS ISSUED TO ACFT Y. IN MY OPINION; THE RADAR TRAINER SIMPLY MISJUDGED THE LOCATION OF THE FIX XING. BOTH THE RADAR TRAINER AND DEVELOPMENTAL HANDLED THE SITUATION PROFESSIONALLY; AND SAFETY WAS NOT COMPROMISED.
Data retrieved from NASA's ASRS site as of May 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.