ATC equipment problem radar ASR-9.

Attributes
ACN	286816
Time
Date	199410
Place
Locale Reference	atc facility : stl
State Reference	MO
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : stl tower : csg
Person 1
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Experience	controller radar : 11
ASRS Report	286816
Events
Anomaly	other anomaly other
Independent Detector	other controllera
Resolutory Action	none taken : unable
Consequence	faa : investigated
Supplementary
Primary Problem	Navigational Facility
Air Traffic Incident	other
Situations
Navigational Aid	Unspecified

Narrative:

I was working final monitor north this morning. We were on runway 12L/right. The following aircraft were coasting: air carrier lda. Air carrier RRR. Air carrier lda. Air carrier RRR. Air carrier lda. Air carrier lda (set off the ca with itself). Air carrier lda. Air carrier RRR. Air carrier lda. Additionally, the final north controller advised me that air carrier was on downwind during the same rush and the target jumped, making it appear that he had turned base and causing unnecessary heart palpitations. The next rush we switched to runway 30L/right. I was working final north. The final south controller had a air carrier on downwind, it temporarily went into coast and ca'd with itself. (Once again causing unnecessary heart palpitations.) callback conversation with reporter revealed the following information: reporter stated the coasting problem became worse when stl started using the lda approach. A D BRITE radar scope was installed in the TRACON from the tower and the problem is not as bad.

Original NASA ASRS Text

Title: ATC EQUIP PROB RADAR ASR-9.

Narrative: I WAS WORKING FINAL MONITOR N THIS MORNING. WE WERE ON RWY 12L/R. THE FOLLOWING ACFT WERE COASTING: ACR LDA. ACR RRR. ACR LDA. ACR RRR. ACR LDA. ACR LDA (SET OFF THE CA WITH ITSELF). ACR LDA. ACR RRR. ACR LDA. ADDITIONALLY, THE FINAL N CTLR ADVISED ME THAT ACR WAS ON DOWNWIND DURING THE SAME RUSH AND THE TARGET JUMPED, MAKING IT APPEAR THAT HE HAD TURNED BASE AND CAUSING UNNECESSARY HEART PALPITATIONS. THE NEXT RUSH WE SWITCHED TO RWY 30L/R. I WAS WORKING FINAL N. THE FINAL S CTLR HAD A ACR ON DOWNWIND, IT TEMPORARILY WENT INTO COAST AND CA'D WITH ITSELF. (ONCE AGAIN CAUSING UNNECESSARY HEART PALPITATIONS.) CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATED THE COASTING PROB BECAME WORSE WHEN STL STARTED USING THE LDA APCH. A D BRITE RADAR SCOPE WAS INSTALLED IN THE TRACON FROM THE TWR AND THE PROB IS NOT AS BAD.

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.