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Radar system released to radar maintenance. Primary radar targets separated from associated secondary beacon slashes. Controller determined that secondary beacon slashes correlated with active traffic. Aircraft were vectored to final approach course. Radar system returned to normal service within 4 mins without further incident.
| Attributes | |
| ACN | 386771 |
| Time | |
| Date | 199711 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : anc |
| State Reference | AK |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| Experience | controller non radar : 3 controller radar : 7 |
| ASRS Report | 386771 |
| Person 2 | |
| Affiliation | government : faa |
| Function | other personnel other |
| Qualification | other other : other |
| Events | |
| Anomaly | other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | none taken : anomaly accepted |
| Supplementary | |
| Primary Problem | Navigational Facility |
| Air Traffic Incident | other |
| Situations | |
| Navigational Aid | Unspecified |
Narrative:
Anc radar maintenance had control of the radar. Primary targets instantly separated from the secondary targets by about 8 mi lateral. Aircraft locations were visually verified by tower to coincide with the beacon target. Aircraft were vectored and sequenced for 3 or 4 mins by the beacon targets and associated position symbol/ARTS iia data tag. Radar was fully restored by maintenance in 4 mins. No loss of separation.
Original NASA ASRS Text
Title: RADAR SYS RELEASED TO RADAR MAINT. PRIMARY RADAR TARGETS SEPARATED FROM ASSOCIATED SECONDARY BEACON SLASHES. CTLR DETERMINED THAT SECONDARY BEACON SLASHES CORRELATED WITH ACTIVE TFC. ACFT WERE VECTORED TO FINAL APCH COURSE. RADAR SYS RETURNED TO NORMAL SVC WITHIN 4 MINS WITHOUT FURTHER INCIDENT.
Narrative: ANC RADAR MAINT HAD CTL OF THE RADAR. PRIMARY TARGETS INSTANTLY SEPARATED FROM THE SECONDARY TARGETS BY ABOUT 8 MI LATERAL. ACFT LOCATIONS WERE VISUALLY VERIFIED BY TWR TO COINCIDE WITH THE BEACON TARGET. ACFT WERE VECTORED AND SEQUENCED FOR 3 OR 4 MINS BY THE BEACON TARGETS AND ASSOCIATED POS SYMBOL/ARTS IIA DATA TAG. RADAR WAS FULLY RESTORED BY MAINT IN 4 MINS. NO LOSS OF SEPARATION.
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.