NAS system failure at ATC facility.

Attributes
ACN	135061
Time
Date	199001
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : zlc
State Reference	UT
Environment
Flight Conditions	Mixed
Light	Dusk
Person 1
Affiliation	government : faa
Function	controller : radar
Experience	controller non radar : 4 controller radar : 4
ASRS Report	135061
Events
Anomaly	other anomaly other
Independent Detector	other controllera
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	other
Situations
ATC Facility	other physical facility

Narrative:

I was working ZLC sector 7. I had just sat down when the NAS system failed. I switched to darc K and the function was tied off for more than 5 minutes. Sectors 4 and 19 did not have use of the darc. Sector 4's scope went completely blank. Similar instances happened on other sectors. Many unreported deviations could have occurred.

Original NASA ASRS Text

Title: NAS SYSTEM FAILURE AT ATC FAC.

Narrative: I WAS WORKING ZLC SECTOR 7. I HAD JUST SAT DOWN WHEN THE NAS SYSTEM FAILED. I SWITCHED TO DARC K AND THE FUNCTION WAS TIED OFF FOR MORE THAN 5 MINUTES. SECTORS 4 AND 19 DID NOT HAVE USE OF THE DARC. SECTOR 4'S SCOPE WENT COMPLETELY BLANK. SIMILAR INSTANCES HAPPENED ON OTHER SECTORS. MANY UNREPORTED DEVIATIONS COULD HAVE OCCURRED.

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.