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Loss of separation occurred when controller allowed a commuter aircraft descended through an occupied altitude.
| Attributes | |
| ACN | 576306 |
| Time | |
| Date | 200303 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | navaid : pxt.vortac |
| State Reference | MD |
| Altitude | msl single value : 14000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Dash 8 Series Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : enroute altitude change descent : approach |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Do 328 TP (Turboprop) |
| 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 non radar : 12 controller radar : 11 controller time certified in position1 : 11 flight time total : 425 |
| ASRS Report | 576306 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation non adherence : published procedure |
| Independent Detector | atc equipment : conflict alert atc equipment other atc equipment : radar other controllera other flight crewa other flight crewb |
| Resolutory Action | flight crew : took evasive action |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 27000 vertical : 0 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Controller distraction due to automation problems, mix of aircraft types and performance.
Original NASA ASRS Text
Title: LOSS OF SEPARATION OCCURRED WHEN CTLR ALLOWED A COMMUTER ACFT DSNDED THROUGH AN OCCUPIED ALT.
Narrative: CTLR DISTR DUE TO AUTOMATION PROBS, MIX OF ACFT TYPES AND PERFORMANCE.
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.