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Mem approach controller described conflict alert event activated by two departures from runway 18R/18L; assigned diverging headings.
| Attributes | |
| ACN | 792458 |
| Time | |
| Date | 200806 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | navaid : mem.vortac |
| State Reference | TN |
| Altitude | msl single value : 2000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : mem.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : mem.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : local |
| Qualification | controller : radar |
| Experience | controller non radar : 6.5 controller radar : 12.5 controller time certified in position1 : 6 |
| ASRS Report | 792458 |
| Events | |
| Anomaly | other anomaly other |
| Independent Detector | atc equipment : conflict alert other controllera |
| Resolutory Action | controller : issued new clearance |
| Miss Distance | horizontal : 3500 vertical : 0 |
| Supplementary | |
| Problem Areas | Navigational Facility FAA |
| Primary Problem | Navigational Facility |
Narrative:
I was working departure coordinator when aircraft X departed runway 18R on runway heading. Simultaneously; aircraft Y departed runway 18L and; in accordance with assigned instructions from the tower; turned to a 160 degree heading 1 mi south of the mem VOR. The west departure controller turned aircraft X wbound; and the east departure controller turned aircraft Y eastbound. As the aircraft turned; the conflict alert went off; even though the aircraft were flying away from each other. I believe that our equipment at mem ATCT has a history of false or late conflict alerts; but I do not know if it has been documented.
Original NASA ASRS Text
Title: MEM APCH CTLR DESCRIBED CONFLICT ALERT EVENT ACTIVATED BY TWO DEPS FROM RWY 18R/18L; ASSIGNED DIVERGING HEADINGS.
Narrative: I WAS WORKING DEP COORDINATOR WHEN ACFT X DEPARTED RWY 18R ON RWY HDG. SIMULTANEOUSLY; ACFT Y DEPARTED RWY 18L AND; IN ACCORDANCE WITH ASSIGNED INSTRUCTIONS FROM THE TWR; TURNED TO A 160 DEG HDG 1 MI S OF THE MEM VOR. THE W DEP CTLR TURNED ACFT X WBOUND; AND THE E DEP CTLR TURNED ACFT Y EBOUND. AS THE ACFT TURNED; THE CONFLICT ALERT WENT OFF; EVEN THOUGH THE ACFT WERE FLYING AWAY FROM EACH OTHER. I BELIEVE THAT OUR EQUIP AT MEM ATCT HAS A HISTORY OF FALSE OR LATE CONFLICT ALERTS; BUT I DO NOT KNOW IF IT HAS BEEN DOCUMENTED.
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.