Mci TRACON controller issues traffic alert on unknown aircraft to mci arrival.

Attributes
ACN	573695
Time
Date	200302
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : mci.tracon
State Reference	KS
Environment
Flight Conditions	IMC
Light	Dusk
Aircraft 1
Controlling Facilities	tracon : mci.tracon
Operator	common carrier : air carrier
Make Model Name	Regional Jet CL65, Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : mci.tracon
Operator	common carrier : air taxi
Make Model Name	Beech 1900
Operating Under FAR Part	Part 135
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar pilot : instrument
Experience	controller time certified in position1 : 17 flight time total : 1000
ASRS Report	573695
Person 2
Affiliation	government : faa
Function	controller : supervisor
Events
Anomaly	conflict : airborne critical non adherence : far non adherence : required legal separation
Independent Detector	atc equipment : conflict alert other controllera
Resolutory Action	controller : issued alert controller : issued new clearance flight crew : took evasive action
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 6000 vertical : 500
Supplementary
Problem Areas	Flight Crew Human Performance Weather
Primary Problem	Flight Crew Human Performance

Narrative:

Air carrier Y checked on over jhawk at 12000 ft, gave aircraft instructions for arrival. Within seconds gave traffic alert at 10 O'clock position, then another at 12 O'clock position 1 mi 11500 ft climbing. Then traffic alert with turn, aircraft responded with immediate climb. Aircraft (air carrier X) had reported in clouds. Air carrier Y aircraft was missed by the third aircraft by less than 3 mi and 500 ft. The third aircraft (unknown) was on a XXXX squawk, doing about 360 KTS. Once aircraft missed air carrier X, it descended to 9500 ft and changed to VFR squawk. I tagged aircraft as CBA1, tagged was dropped south of ojc, I retagged aircraft. Third aircraft appeared to land at szl, supervisor said he spoke with pilot and he was VFR and saw air carrier Y.

Original NASA ASRS Text

Title: MCI TRACON CTLR ISSUES TFC ALERT ON UNKNOWN ACFT TO MCI ARR.

Narrative: ACR Y CHKED ON OVER JHAWK AT 12000 FT, GAVE ACFT INSTRUCTIONS FOR ARR. WITHIN SECONDS GAVE TFC ALERT AT 10 O'CLOCK POS, THEN ANOTHER AT 12 O'CLOCK POS 1 MI 11500 FT CLBING. THEN TFC ALERT WITH TURN, ACFT RESPONDED WITH IMMEDIATE CLB. ACFT (ACR X) HAD RPTED IN CLOUDS. ACR Y ACFT WAS MISSED BY THE THIRD ACFT BY LESS THAN 3 MI AND 500 FT. THE THIRD ACFT (UNKNOWN) WAS ON A XXXX SQUAWK, DOING ABOUT 360 KTS. ONCE ACFT MISSED ACR X, IT DSNDED TO 9500 FT AND CHANGED TO VFR SQUAWK. I TAGGED ACFT AS CBA1, TAGGED WAS DROPPED S OF OJC, I RETAGGED ACFT. THIRD ACFT APPEARED TO LAND AT SZL, SUPVR SAID HE SPOKE WITH PLT AND HE WAS VFR AND SAW ACR Y.

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.