Aircraft descending into ord conflicts with traffic in level flight.

Attributes
ACN	469520
Time
Date	200004
Day	Wed
Local Time Of Day	1201 To 1800
Place
State Reference	IN
Altitude	msl single value : 23000
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zau.artcc
Operator	general aviation : personal
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 91
Flight Phase	descent : vacating altitude
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zau.artcc
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller radar : 15
ASRS Report	469520
Person 2
Affiliation	other
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : airborne less severe non adherence : published procedure
Independent Detector	other controllera
Resolutory Action	none taken : anomaly accepted
Miss Distance	horizontal : 24000
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Aircraft X was descending into chicago. Aircraft Y was at cruise altitude. Aircraft Y turned prior to reaching the GIJ092036 and then possibly came within less than 5 mi of aircraft X.

Original NASA ASRS Text

Title: ACFT DSNDING INTO ORD CONFLICTS WITH TFC IN LEVEL FLT.

Narrative: ACFT X WAS DSNDING INTO CHICAGO. ACFT Y WAS AT CRUISE ALT. ACFT Y TURNED PRIOR TO REACHING THE GIJ092036 AND THEN POSSIBLY CAME WITHIN LESS THAN 5 MI OF ACFT X.

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.