Medium large transport at cruise has TCASII RA.

Attributes
ACN	277030
Time
Date	199407
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : rfd
State Reference	IL
Altitude	msl bound lower : 12000 msl bound upper : 12800
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zau
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	cruise other
Route In Use	enroute : direct
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	climbout : intermediate altitude
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : commercial pilot : cfi pilot : atp pilot : instrument
Experience	flight time last 90 days : 210 flight time total : 21700 flight time type : 7600
ASRS Report	277030
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : atp pilot : commercial
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : airborne less severe
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 9000 vertical : 0
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

We were en route from msp to mdw. We had deviated east of course for WX and were proceeding direct to rfd VOR when TCASII issued a TA at our 10 O'clock position, 700 ft below and 2 mi. Traffic then climbed to our altitude whereupon an RA for a climb was issued. First officer disengaged autoplt and commenced a 500 FPM climb into the green band. The captain was continuing a visual search. A clear of conflict was issued and the aircraft uneventfully returned to level flight, whereupon the incident was reported to ATC.

Original NASA ASRS Text

Title: MLG AT CRUISE HAS TCASII RA.

Narrative: WE WERE ENRTE FROM MSP TO MDW. WE HAD DEVIATED E OF COURSE FOR WX AND WERE PROCEEDING DIRECT TO RFD VOR WHEN TCASII ISSUED A TA AT OUR 10 O'CLOCK POS, 700 FT BELOW AND 2 MI. TFC THEN CLBED TO OUR ALT WHEREUPON AN RA FOR A CLB WAS ISSUED. FO DISENGAGED AUTOPLT AND COMMENCED A 500 FPM CLB INTO THE GREEN BAND. THE CAPT WAS CONTINUING A VISUAL SEARCH. A CLR OF CONFLICT WAS ISSUED AND THE ACFT UNEVENTFULLY RETURNED TO LEVEL FLT, WHEREUPON THE INCIDENT WAS RPTED TO ATC.

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.