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New ARTS program installed and rapidly caused the system to scatter, resulting in track lost and erroneous conflict alert alarms.
| Attributes | |
| ACN | 236851 |
| Time | |
| Date | 199302 |
| Day | Sun |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : stl |
| State Reference | MO |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : stl |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| ASRS Report | 236851 |
| Events | |
| Anomaly | other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | none taken : unable |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Navigational Facility |
| Air Traffic Incident | other |
| Situations | |
| ATC Facility | other physical facility |
| Navigational Aid | Unspecified |
Narrative:
Sun morning, feb/xx/93, ARTS 3.05 was installed at stl. 1 controller said he had 8-10 aircraft and the system scattered 3 times in 4 mins. The tracks returned each time within 30 seconds. Another controller said all his aircraft in arrival track were flashing conflict alert, even though there was no conflict. Supposedly the ARTS 3.05 had been thoroughly tested, obviously not thorough enough. The problem was removed promptly.
Original NASA ASRS Text
Title: NEW ARTS PROGRAM INSTALLED AND RAPIDLY CAUSED THE SYS TO SCATTER, RESULTING IN TRACK LOST AND ERRONEOUS CONFLICT ALERT ALARMS.
Narrative: SUN MORNING, FEB/XX/93, ARTS 3.05 WAS INSTALLED AT STL. 1 CTLR SAID HE HAD 8-10 ACFT AND THE SYS SCATTERED 3 TIMES IN 4 MINS. THE TRACKS RETURNED EACH TIME WITHIN 30 SECONDS. ANOTHER CTLR SAID ALL HIS ACFT IN ARR TRACK WERE FLASHING CONFLICT ALERT, EVEN THOUGH THERE WAS NO CONFLICT. SUPPOSEDLY THE ARTS 3.05 HAD BEEN THOROUGHLY TESTED, OBVIOUSLY NOT THOROUGH ENOUGH. THE PROB WAS REMOVED PROMPTLY.
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.