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ARTCC controller reacts to conflict alert activation when descending air carrier overshot assigned altitude of FL180 and conflicts with DH8 at 17000 ft.
| Attributes | |
| ACN | 407851 |
| Time | |
| Date | 199807 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : sdz |
| State Reference | NC |
| Altitude | msl bound lower : 17000 msl bound upper : 17400 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Dash 8 Series Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 11 |
| ASRS Report | 407851 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : overshoot conflict : nmac non adherence : clearance non adherence : required legal separation |
| Independent Detector | atc equipment other atc equipment : unspecified other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 0 vertical : 400 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
Narrative:
Aircraft #1 was assigned descent to FL180. Aircraft #2 was climbing to 17000 ft. Aircraft #1 descended through FL180 and came within 400 ft of aircraft #2.
Original NASA ASRS Text
Title: ARTCC CTLR REACTS TO CONFLICT ALERT ACTIVATION WHEN DSNDING ACR OVERSHOT ASSIGNED ALT OF FL180 AND CONFLICTS WITH DH8 AT 17000 FT.
Narrative: ACFT #1 WAS ASSIGNED DSCNT TO FL180. ACFT #2 WAS CLBING TO 17000 FT. ACFT #1 DSNDED THROUGH FL180 AND CAME WITHIN 400 FT OF ACFT #2.
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.