Mdt crew had TCASII RA in ZAU class east airspace.

Attributes
ACN	457770
Time
Date	199912
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : gyy.airport
State Reference	IN
Altitude	msl single value : 5000
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Controlling Facilities	artcc : zau.artcc
Operator	common carrier : air carrier
Make Model Name	Medium Transport, Low Wing, 2 Turbojet Eng
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	descent : intermediate altitude
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zau.artcc
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	climbout : vacating altitude
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 210 flight time total : 3100 flight time type : 520
ASRS Report	457770
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : airborne less severe non adherence : far non adherence : published procedure
Independent Detector	aircraft equipment : tcas other controllera other flight crewa other flight crewb
Resolutory Action	controller : issued advisory
Miss Distance	horizontal : 3000 vertical : 750
Supplementary
Problem Areas	Airspace Structure Flight Crew Human Performance ATC Human Performance FAA
Primary Problem	Flight Crew Human Performance

Narrative:

Second RA in 3 weeks in same location! Descending for mdw, being controled by ZAU, received TA alert and spotted traffic at 12 O'clock turning to my left. Traffic climbed causing RA for me to climb, which I did. TA at approximately 1000 ft and closing to RA 500 ft and approximately 1/2 mi. ATC responded the last min after traffic passed.

Original NASA ASRS Text

Title: MDT CREW HAD TCASII RA IN ZAU CLASS E AIRSPACE.

Narrative: SECOND RA IN 3 WKS IN SAME LOCATION! DSNDING FOR MDW, BEING CTLED BY ZAU, RECEIVED TA ALERT AND SPOTTED TFC AT 12 O'CLOCK TURNING TO MY L. TFC CLBED CAUSING RA FOR ME TO CLB, WHICH I DID. TA AT APPROX 1000 FT AND CLOSING TO RA 500 FT AND APPROX 1/2 MI. ATC RESPONDED THE LAST MIN AFTER TFC PASSED.

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.