CL65 crew had TCASII RA in ZAU class east airspace.

Attributes
ACN	478291
Time
Date	200007
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : sbn.airport
State Reference	IN
Altitude	msl bound lower : 8000 msl bound upper : 9000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zau.artcc
Operator	common carrier : air carrier
Make Model Name	Regional Jet CL65, Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	climbout : intermediate altitude climbout : vacating altitude
Route In Use	departure : on vectors
Flight Plan	IFR
Aircraft 2
Operator	general aviation : personal
Make Model Name	Cheetah, Tiger, Traveler
Operating Under FAR Part	Part 91
Flight Phase	cruise : level
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial pilot : multi engine
Experience	flight time last 90 days : 300 flight time total : 2100 flight time type : 800
ASRS Report	478291
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : airborne critical other anomaly other
Independent Detector	aircraft equipment : tcas other flight crewa other flight crewb
Resolutory Action	flight crew : took evasive action
Miss Distance	horizontal : 50 vertical : 500
Supplementary
Problem Areas	FAA Flight Crew Human Performance ATC Human Performance
Primary Problem	Ambiguous

Narrative:

While climbing out of south bend, ZAU cleared us to 9000 ft. I had the TCASII page up on my EFIS display and noticed a target at 9000 ft on our flight path. I continued to monitor the target and at 8000 ft I informed the captain. He disengaged the autoplt and at 8100 ft the TCASII announced 'traffic, traffic' a TA. In the next second, the TCASII switched to an RA and commanded us to descend, which we did. At that time ZAU cleared us to climb to 15000 ft right through the traffic. I then spotted the traffic, which we stayed visually clear of. I then asked center if they had him on radar and he told us no. He said that approach (south bend?) had him on radar but was not talking to him.

Original NASA ASRS Text

Title: CL65 CREW HAD TCASII RA IN ZAU CLASS E AIRSPACE.

Narrative: WHILE CLBING OUT OF SOUTH BEND, ZAU CLRED US TO 9000 FT. I HAD THE TCASII PAGE UP ON MY EFIS DISPLAY AND NOTICED A TARGET AT 9000 FT ON OUR FLT PATH. I CONTINUED TO MONITOR THE TARGET AND AT 8000 FT I INFORMED THE CAPT. HE DISENGAGED THE AUTOPLT AND AT 8100 FT THE TCASII ANNOUNCED 'TFC, TFC' A TA. IN THE NEXT SECOND, THE TCASII SWITCHED TO AN RA AND COMMANDED US TO DSND, WHICH WE DID. AT THAT TIME ZAU CLRED US TO CLB TO 15000 FT RIGHT THROUGH THE TFC. I THEN SPOTTED THE TFC, WHICH WE STAYED VISUALLY CLR OF. I THEN ASKED CTR IF THEY HAD HIM ON RADAR AND HE TOLD US NO. HE SAID THAT APCH (SOUTH BEND?) HAD HIM ON RADAR BUT WAS NOT TALKING TO HIM.

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.