Atx X TCASII RA on short final approach due to aircraft on ground with transponder on.

Attributes
ACN	265879
Time
Date	199403
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : hts
State Reference	WV
Altitude	agl bound lower : 500 agl bound upper : 500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : hts
Operator	common carrier : air taxi
Make Model Name	Dash 8 Series Undifferentiated or Other Model
Operating Under FAR Part	Part 135
Navigation In Use	Other
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : flight data
Qualification	controller : radar
Experience	controller non radar : 6 controller radar : 1
ASRS Report	265879
Person 2
Affiliation	government : faa
Function	controller : local
Qualification	controller : radar
Events
Anomaly	other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Atx X (DH-8) inbound, short final. Pilot advised local controller that aircraft on ground with transponder(south) on were setting off their TCASII RA. Local informed the captain that the runway was clear and that he was cleared to land. The aircraft landed without incident. The captain later called the tower and informed us that he would have been forced to go around had the conditions been IMC. Recommendation: although safety was not an issue in this particular case, sits like this are becoming quite a concern for air traffic controllers. RA's reported by aircraft on short final are a problem because they add to frequency congestion and increase stress and workload.

Original NASA ASRS Text

Title: ATX X TCASII RA ON SHORT FINAL APCH DUE TO ACFT ON GND WITH XPONDER ON.

Narrative: ATX X (DH-8) INBOUND, SHORT FINAL. PLT ADVISED LCL CTLR THAT ACFT ON GND WITH XPONDER(S) ON WERE SETTING OFF THEIR TCASII RA. LCL INFORMED THE CAPT THAT THE RWY WAS CLR AND THAT HE WAS CLRED TO LAND. THE ACFT LANDED WITHOUT INCIDENT. THE CAPT LATER CALLED THE TWR AND INFORMED US THAT HE WOULD HAVE BEEN FORCED TO GAR HAD THE CONDITIONS BEEN IMC. RECOMMENDATION: ALTHOUGH SAFETY WAS NOT AN ISSUE IN THIS PARTICULAR CASE, SITS LIKE THIS ARE BECOMING QUITE A CONCERN FOR AIR TFC CTLRS. RA'S RPTED BY ACFT ON SHORT FINAL ARE A PROB BECAUSE THEY ADD TO FREQ CONGESTION AND INCREASE STRESS AND WORKLOAD.

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.