TCASII on air carrier large transport X commands descent due conflict with small aircraft Y.

Attributes
ACN	203032
Time
Date	199202
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : mia airport : fll
State Reference	FL
Altitude	msl bound lower : 4000 msl bound upper : 5500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : mia
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	climbout : intermediate altitude cruise other
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Make Model Name	Small Aircraft
Flight Phase	descent other
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 220 flight time total : 14000 flight time type : 7000
ASRS Report	203032
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 205 flight time total : 5366 flight time type : 2581
ASRS Report	203234
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : airborne less severe other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 600 vertical : 300
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

Level 5000 MSL on departure from fll approximately 13 NM on the mia 350 radial awaiting climb clearance. TCASII picked up numerous targets including a VFR at 12 O'clock level 5500 ft coming towards us. VFR traffic Y began a descent, TCASII issued a RA to descend. Descent was began immediately, ATC was advised of RA and descent. TCASII issued monitor vertical speed, and we leveled 4000 MSL. Single engine aircraft Y passed slightly right overhead. Fortunately the other aircraft had his transponder/mode C on so that TCASII worked. Traffic appeared to be inbound to the mia/fll area. Although outside the mia TCA, it would have helped if the aircraft had been talking to the approach facility even if not landing inside the TCA or to be well established at a lower altitude well before flying under the TCA. If he was talking to a facility it wasn't our departure controller.

Original NASA ASRS Text

Title: TCASII ON ACR LGT X COMMANDS DSCNT DUE CONFLICT WITH SMA Y.

Narrative: LEVEL 5000 MSL ON DEP FROM FLL APPROX 13 NM ON THE MIA 350 RADIAL AWAITING CLB CLRNC. TCASII PICKED UP NUMEROUS TARGETS INCLUDING A VFR AT 12 O'CLOCK LEVEL 5500 FT COMING TOWARDS US. VFR TFC Y BEGAN A DSCNT, TCASII ISSUED A RA TO DSND. DSCNT WAS BEGAN IMMEDIATELY, ATC WAS ADVISED OF RA AND DSCNT. TCASII ISSUED MONITOR VERT SPD, AND WE LEVELED 4000 MSL. SINGLE ENG ACFT Y PASSED SLIGHTLY R OVERHEAD. FORTUNATELY THE OTHER ACFT HAD HIS TRANSPONDER/MODE C ON SO THAT TCASII WORKED. TFC APPEARED TO BE INBOUND TO THE MIA/FLL AREA. ALTHOUGH OUTSIDE THE MIA TCA, IT WOULD HAVE HELPED IF THE ACFT HAD BEEN TALKING TO THE APCH FACILITY EVEN IF NOT LNDG INSIDE THE TCA OR TO BE WELL ESTABLISHED AT A LOWER ALT WELL BEFORE FLYING UNDER THE TCA. IF HE WAS TALKING TO A FACILITY IT WASN'T OUR DEP CTLR.

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.