<< >> NASA ASRS Report 391740, January 1998

Reported situation of problem with same pvd recurring problem with displayed data drifting across the scope.

Attributes
ACN	391740
Time
Date	199801
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : rdu
State Reference	NC
Environment
Flight Conditions	VMC
Light	Daylight
Person 1
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar pilot : student
Experience	controller radar : 13 flight time total : 20
ASRS Report	391740
Events
Anomaly	other anomaly other
Independent Detector	other controllera
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Supplementary
Air Traffic Incident	other
Situations
ATC Facility	other physical facility

Narrative:

East final radar position radar scope noted 'serial #XXX' on upper right front side of scope presents a situation of chronic unsatisfactory maintenance which may contribute to an accident or incident. When sweep switch is in 'dectred' position, the entire radar display (targets, alpha numerics, map) drifts, presenting a moving display. No less than 3 times in the last several months, this scope has been called 'OTS' due to this problem, put back in service, yet continues to exhibit this unsatisfactory condition.

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Original NASA ASRS Text

Title: RPTED SIT OF PROB WITH SAME PVD RECURRING PROB WITH DISPLAYED DATA DRIFTING ACROSS THE SCOPE.

Narrative: E FINAL RADAR POS RADAR SCOPE NOTED 'SERIAL #XXX' ON UPPER R FRONT SIDE OF SCOPE PRESENTS A SIT OF CHRONIC UNSATISFACTORY MAINT WHICH MAY CONTRIBUTE TO AN ACCIDENT OR INCIDENT. WHEN SWEEP SWITCH IS IN 'DECTRED' POS, THE ENTIRE RADAR DISPLAY (TARGETS, ALPHA NUMERICS, MAP) DRIFTS, PRESENTING A MOVING DISPLAY. NO LESS THAN 3 TIMES IN THE LAST SEVERAL MONTHS, THIS SCOPE HAS BEEN CALLED 'OTS' DUE TO THIS PROB, PUT BACK IN SVC, YET CONTINUES TO EXHIBIT THIS UNSATISFACTORY CONDITION.

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.