Air carrier X TCASII TA RA evasive action taken had less than standard separation from traffic Y. Sy...

Attributes
ACN	242136
Time
Date	199305
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : mci
State Reference	MO
Altitude	msl bound lower : 2500 msl bound upper : 2500
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : mci
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	cruise other
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	climbout : intermediate altitude
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 14000 flight time type : 7000
ASRS Report	242136
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	conflict : airborne less severe non adherence : clearance non adherence : published procedure non adherence : required legal separation
Independent Detector	aircraft equipment other aircraft equipment : unspecified other controllera
Resolutory Action	controller : issued new clearance
Consequence	Other
Miss Distance	horizontal : 12000 vertical : 300
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Approach control was providing radar vectors for the ILS approach to 1L at mkc. Air carrier X, in the clouds and heading 270 degrees at an altitude of 2500 ft MSL. TCASII announced 'traffic' at 10 O'clock, 3-4 mi, and 200 ft below us. Approach began to issue a turn to a northerly heading, and as he began to speak, the TCASII target Y moved to 9 O'clock and 2 mi. TCASII issued an RA 'climb, climb.' we climbed to 3000 ft MSL where the TCASII changed to 'monitor vertical speed,' so we leveled and began a turn to the right. As soon as the controller finished his transmission, I announced the RA and that we were climbing to comply. Approach indicated he knew of the traffic. We broke out of the clouds and told the controller we could now see the runway, whereupon he issued clearance for a visual approach.

Original NASA ASRS Text

Title: ACR X TCASII TA RA EVASIVE ACTION TAKEN HAD LTSS FROM TFC Y. SYS ERROR.

Narrative: APCH CTL WAS PROVIDING RADAR VECTORS FOR THE ILS APCH TO 1L AT MKC. ACR X, IN THE CLOUDS AND HDG 270 DEGS AT AN ALT OF 2500 FT MSL. TCASII ANNOUNCED 'TFC' AT 10 O'CLOCK, 3-4 MI, AND 200 FT BELOW US. APCH BEGAN TO ISSUE A TURN TO A NORTHERLY HDG, AND AS HE BEGAN TO SPEAK, THE TCASII TARGET Y MOVED TO 9 O'CLOCK AND 2 MI. TCASII ISSUED AN RA 'CLB, CLB.' WE CLBED TO 3000 FT MSL WHERE THE TCASII CHANGED TO 'MONITOR VERT SPD,' SO WE LEVELED AND BEGAN A TURN TO THE R. AS SOON AS THE CTLR FINISHED HIS XMISSION, I ANNOUNCED THE RA AND THAT WE WERE CLBING TO COMPLY. APCH INDICATED HE KNEW OF THE TFC. WE BROKE OUT OF THE CLOUDS AND TOLD THE CTLR WE COULD NOW SEE THE RWY, WHEREUPON HE ISSUED CLRNC FOR A VISUAL APCH.

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.

Air carrier X TCASII TA RA evasive action taken had less than standard separation from traffic Y. System error.