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ZKC controller obtains alarm indicating aircraft in conflict at FL230. When questioned, controller verifies both aircraft are at their assigned, vertically separated altitude.
| Attributes | |
| ACN | 531403 |
| Time | |
| Date | 200111 |
| Day | Wed |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | navaid : emp.vortac |
| State Reference | KS |
| Altitude | msl bound lower : 23000 msl bound upper : 24000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zkc.artcc |
| Operator | general aviation : corporate |
| Make Model Name | Falcon 20FJF/20C/20D/20E/20F |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise : enroute altitude change |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zkc.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 17 |
| ASRS Report | 531403 |
| Person 2 | |
| Affiliation | company : corporate |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | other anomaly other |
| Independent Detector | atc equipment : conflict alert atc equipment other atc equipment : radar |
| Resolutory Action | other |
| Consequence | faa : reviewed incident with flight crew |
| Miss Distance | horizontal : 6000 vertical : 0 |
| Supplementary | |
| Problem Areas | Navigational Facility |
| Primary Problem | Navigational Facility |
Narrative:
FA20 checked on descending to FL240. B737 was level at FL230. Conflict alert went off and FA20 mode C indicated FL230. When asked assigned altitude, he reported level FL240.
Original NASA ASRS Text
Title: ZKC CTLR OBTAINS ALARM INDICATING ACFT IN CONFLICT AT FL230. WHEN QUESTIONED, CTLR VERIFIES BOTH ACFT ARE AT THEIR ASSIGNED, VERTLY SEPARATED ALT.
Narrative: FA20 CHKED ON DSNDING TO FL240. B737 WAS LEVEL AT FL230. CONFLICT ALERT WENT OFF AND FA20 MODE C INDICATED FL230. WHEN ASKED ASSIGNED ALT, HE RPTED LEVEL FL240.
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.