TCASII alert between air carrier X and uga Y.

Attributes
ACN	281181
Time
Date	199408
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : mia
State Reference	FL
Altitude	msl bound lower : 2000 msl bound upper : 2000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : mia
Operator	common carrier : air carrier
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude climbout : takeoff
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	other : unknown
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : cfi pilot : flight engineer
Experience	flight time last 90 days : 120 flight time total : 5000 flight time type : 250
ASRS Report	281181
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : commercial pilot : instrument pilot : atp
Events
Anomaly	aircraft equipment problem : less severe other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	controller : issued new clearance other other
Consequence	Other
Miss Distance	vertical : 200
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

We were cleared for takeoff on runway 9L at the mia airport. The initial clearance was to turn right to a heading of 120 degrees and maintain 5000 ft. On that heading the aircraft was cleaned and in a climb. ATC assigned heading 090 degrees for traffic. Not noticing any targets prior to the ATC clearance, I looked again and found a target at about the 11 O'clock position and 200 ft below us. The target was in the inner circle at this time. The TCASII equipment had only 1 scale. As I turned to a heading of 090 degrees, I looked out to my right expecting to see the traffic. I did, and at about 1-2 O'clock where it would have to be. In the meantime the TCASII gave an RA and commanded a descent of about 2000 FPM, however, the target seemed to remain in the same position even after the turn. In evaluating what I was given I decided not to act in accordance with the TCASII for the following reasons: 1) I had a visual on what I believed was the initial target. 2) the seemingly sudden appearance of the target in the inner circle. 3) the target did not move in accordance with our 30 degree heading change. 4) I would have had to maneuver the aircraft close to the terrain and make a radical attitude change from a 2500 FPM rate of climb to a 2000 FPM rate of descent. 5) we were not issued any other TA by ATC. 6) the captain was hesitant in taking any action as well. 7) the 'see and avoid' principle prevailed at the time and no other traffic was in sight. It is my belief that the TCASII locked on the initial target and did not identify our turn since it can only provide us with vertical separation.

Original NASA ASRS Text

Title: TCASII ALERT BTWN ACR X AND UGA Y.

Narrative: WE WERE CLRED FOR TKOF ON RWY 9L AT THE MIA ARPT. THE INITIAL CLRNC WAS TO TURN R TO A HDG OF 120 DEGS AND MAINTAIN 5000 FT. ON THAT HDG THE ACFT WAS CLEANED AND IN A CLB. ATC ASSIGNED HDG 090 DEGS FOR TFC. NOT NOTICING ANY TARGETS PRIOR TO THE ATC CLRNC, I LOOKED AGAIN AND FOUND A TARGET AT ABOUT THE 11 O'CLOCK POS AND 200 FT BELOW US. THE TARGET WAS IN THE INNER CIRCLE AT THIS TIME. THE TCASII EQUIP HAD ONLY 1 SCALE. AS I TURNED TO A HDG OF 090 DEGS, I LOOKED OUT TO MY R EXPECTING TO SEE THE TFC. I DID, AND AT ABOUT 1-2 O'CLOCK WHERE IT WOULD HAVE TO BE. IN THE MEANTIME THE TCASII GAVE AN RA AND COMMANDED A DSCNT OF ABOUT 2000 FPM, HOWEVER, THE TARGET SEEMED TO REMAIN IN THE SAME POS EVEN AFTER THE TURN. IN EVALUATING WHAT I WAS GIVEN I DECIDED NOT TO ACT IN ACCORDANCE WITH THE TCASII FOR THE FOLLOWING REASONS: 1) I HAD A VISUAL ON WHAT I BELIEVED WAS THE INITIAL TARGET. 2) THE SEEMINGLY SUDDEN APPEARANCE OF THE TARGET IN THE INNER CIRCLE. 3) THE TARGET DID NOT MOVE IN ACCORDANCE WITH OUR 30 DEG HDG CHANGE. 4) I WOULD HAVE HAD TO MANEUVER THE ACFT CLOSE TO THE TERRAIN AND MAKE A RADICAL ATTITUDE CHANGE FROM A 2500 FPM RATE OF CLB TO A 2000 FPM RATE OF DSCNT. 5) WE WERE NOT ISSUED ANY OTHER TA BY ATC. 6) THE CAPT WAS HESITANT IN TAKING ANY ACTION AS WELL. 7) THE 'SEE AND AVOID' PRINCIPLE PREVAILED AT THE TIME AND NO OTHER TFC WAS IN SIGHT. IT IS MY BELIEF THAT THE TCASII LOCKED ON THE INITIAL TARGET AND DID NOT IDENT OUR TURN SINCE IT CAN ONLY PROVIDE US WITH VERTICAL SEPARATION.

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.