An IFR beech bonanza pilot suffered an near midair collision with a high wing cessna.

Attributes
ACN	1103122
Time
Date	201307
Local Time Of Day	0601-1200
Place
Locale Reference	ZAU.ARTCC
State Reference	IL
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Bonanza 35
Operating Under FAR Part	Part 91
Flight Phase	Cruise
Route In Use	Direct
Flight Plan	IFR
Aircraft 2
Make Model Name	Cessna Aircraft Undifferentiated or Other Model
Person 1
Function	Pilot Flying Single Pilot
Qualification	Flight Crew Private Flight Crew Instrument
Experience	Flight Crew Last 90 Days 20 Flight Crew Total 692 Flight Crew Type 130
Person 2
Function	Enroute
Qualification	Air Traffic Control Fully Certified
Events
Anomaly	ATC Issue All Types Conflict NMAC
Miss Distance	Horizontal 0 Vertical 150

Narrative:

While in cruise flight I saw an aircraft quickly pass from left to right underneath us with a vertical distance of less than 200 ft. Piloted aircraft was flying south and approaching aircraft was on a west south west heading. Approaching aircraft was seen at the 7 to 8 o'clock position aft of the left wing at a distance of less than 500 ft horizontally. I was operating on an IFR flight plan and was in communication with chicago center. No traffic advisory or warning was issued. I immediately reported the near miss to chicago center twice with no acknowledgement. I subsequently made three radio calls but was not answered until 15 minutes post incident. I requested the number for chicago center and reported the incident to the facility once on the ground. Chicago center was able to find the recording and said it would be passed to the quality team for review. Due to the high speeds and short duration of the near miss; there was no time to deviate. The rest of the flight continued uneventfully.

Original NASA ASRS Text

Title: An IFR Beech Bonanza pilot suffered an NMAC with a high wing Cessna.

Narrative: While in cruise flight I saw an aircraft quickly pass from left to right underneath us with a vertical distance of less than 200 FT. Piloted aircraft was flying south and approaching aircraft was on a west south west heading. Approaching aircraft was seen at the 7 to 8 o'clock position aft of the left wing at a distance of less than 500 FT horizontally. I was operating on an IFR flight plan and was in communication with Chicago Center. No traffic advisory or warning was issued. I immediately reported the near miss to Chicago Center twice with no acknowledgement. I subsequently made three radio calls but was not answered until 15 minutes post incident. I requested the number for Chicago Center and reported the incident to the facility once on the ground. Chicago Center was able to find the recording and said it would be passed to the Quality team for review. Due to the high speeds and short duration of the near miss; there was no time to deviate. The rest of the flight continued uneventfully.

Data retrieved from NASA's ASRS site as of July 2013 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.