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ARTCC radar controller does not observe overtake speed differential between an A320 and C501 and is involved in a system error.
| Attributes | |
| ACN | 411598 |
| Time | |
| Date | 199808 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : eri |
| State Reference | PA |
| Altitude | msl bound lower : 33000 msl bound upper : 33000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob |
| Operator | common carrier : air carrier |
| Make Model Name | A320 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | general aviation : personal |
| Make Model Name | Citation I/SP |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 16 |
| ASRS Report | 411598 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure non adherence : required legal separation |
| Independent Detector | atc equipment other atc equipment : unspecified |
| Resolutory Action | none taken : detected after the fact |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 28200 vertical : 0 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
I believe I made an error by not noticing the ground speed of the citation in a timely manner. I had thought the citation was doing 450 KTS ground speed, but due to data block overlap and complexity of traffic, actual speed of 350 KTS ground speed was not observed/recognized. To prevent a recurrence -- be more aware of type. A citation can be a slow C500 or a fast C750.
Original NASA ASRS Text
Title: ARTCC RADAR CTLR DOES NOT OBSERVE OVERTAKE SPD DIFFERENTIAL BTWN AN A320 AND C501 AND IS INVOLVED IN A SYS ERROR.
Narrative: I BELIEVE I MADE AN ERROR BY NOT NOTICING THE GND SPD OF THE CITATION IN A TIMELY MANNER. I HAD THOUGHT THE CITATION WAS DOING 450 KTS GND SPD, BUT DUE TO DATA BLOCK OVERLAP AND COMPLEXITY OF TFC, ACTUAL SPD OF 350 KTS GND SPD WAS NOT OBSERVED/RECOGNIZED. TO PREVENT A RECURRENCE -- BE MORE AWARE OF TYPE. A CITATION CAN BE A SLOW C500 OR A FAST C750.
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.