Air carrier X TCASII RA evasive action taken climb from ghost target.

Attributes
ACN	236700
Time
Date	199303
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : mia
State Reference	FL
Altitude	msl bound lower : 1500 msl bound upper : 1500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : mia
Operator	common carrier : air carrier
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : local
Qualification	controller : radar
Experience	controller non radar : 9 controller radar : 1
ASRS Report	236700
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

I was working the local control south position at mia ATCT. Air carrier X was on a visual approach to runway 9R and cleared to land. At 1500 ft on a 3 mi final, the pilot advised me he was going around due to a TCASII RA. He said there was traffic ahead of him at 1500 ft. I did not observe any traffic between him and the airport. This was obviously a false target. Luckily, there was no one above him when he climbed. This is not the first time TCASII has provided false RA's. In my opinion, and most controllers will agree, TCASII is causing more problems than it is worth. TCASII is not safe, it is not a good system and should be fixed before it is used anymore.

Original NASA ASRS Text

Title: ACR X TCASII RA EVASIVE ACTION TAKEN CLB FROM GHOST TARGET.

Narrative: I WAS WORKING THE LCL CTL S POS AT MIA ATCT. ACR X WAS ON A VISUAL APCH TO RWY 9R AND CLRED TO LAND. AT 1500 FT ON A 3 MI FINAL, THE PLT ADVISED ME HE WAS GOING AROUND DUE TO A TCASII RA. HE SAID THERE WAS TFC AHEAD OF HIM AT 1500 FT. I DID NOT OBSERVE ANY TFC BTWN HIM AND THE ARPT. THIS WAS OBVIOUSLY A FALSE TARGET. LUCKILY, THERE WAS NO ONE ABOVE HIM WHEN HE CLBED. THIS IS NOT THE FIRST TIME TCASII HAS PROVIDED FALSE RA'S. IN MY OPINION, AND MOST CTLRS WILL AGREE, TCASII IS CAUSING MORE PROBS THAN IT IS WORTH. TCASII IS NOT SAFE, IT IS NOT A GOOD SYS AND SHOULD BE FIXED BEFORE IT IS USED ANYMORE.

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.