Air carrier X TCASII RA with VFR small transport. Evasive action taken. See and avoid concept.

Attributes
ACN	259906
Time
Date	199312
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : fll
State Reference	FL
Altitude	msl bound lower : 4000 msl bound upper : 4500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : mia artcc : zhu
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Navigation In Use	Other
Flight Phase	cruise other
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Operator	general aviation : personal
Make Model Name	Small Transport, Low Wing, 2 Recip Eng
Flight Phase	cruise other
Route In Use	enroute : direct
Flight Plan	VFR
Person 1
Affiliation	government : faa
Function	controller : departure
Qualification	controller : radar
Experience	controller non radar : 9 controller radar : 3
ASRS Report	259906
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 12000 vertical : 500
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

I was working the fll departure sector at mia approach. Air carrier X was 12 northeast of fll nebound leveling at 4000 ft. I had issued traffic to air carrier X, 11 O'clock, 6 mi, an small transport Y level at 4500 ft VFR. Soon after this air carrier X advised me that he had a TCASII RA and was descending. This was totally unneeded deviation. Luckily, there were no aircraft below air carrier X. I think TCASII is an accident waiting to happen.

Original NASA ASRS Text

Title: ACR X TCASII RA WITH VFR SMT. EVASIVE ACTION TAKEN. SEE AND AVOID CONCEPT.

Narrative: I WAS WORKING THE FLL DEP SECTOR AT MIA APCH. ACR X WAS 12 NE OF FLL NEBOUND LEVELING AT 4000 FT. I HAD ISSUED TFC TO ACR X, 11 O'CLOCK, 6 MI, AN SMT Y LEVEL AT 4500 FT VFR. SOON AFTER THIS ACR X ADVISED ME THAT HE HAD A TCASII RA AND WAS DSNDING. THIS WAS TOTALLY UNNEEDED DEV. LUCKILY, THERE WERE NO ACFT BELOW ACR X. I THINK TCASII IS AN ACCIDENT WAITING TO HAPPEN.

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.