An apparent potential conflict between climbing and descending traffic in the ord area. TA not given...

Attributes
ACN	353220
Time
Date	199611
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : ord
State Reference	IL
Altitude	msl bound lower : 8000 msl bound upper : 11000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : ord tower : pvr
Operator	common carrier : air carrier
Make Model Name	MD-80 Super 80
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	descent other
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Route In Use	departure other enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	353220
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action other
Consequence	Other
Miss Distance	horizontal : 24000 vertical : 0
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Deviation Intra Facility Coordination Failure other

Narrative:

ATC facility: ord approach. Location: ord 220 degree radial 30 mi. After being cleared to descend to 8000 ft from 11000 ft, we got a TA on the TCASII at 12 O'clock, approximately 4 mi, about 1000 ft below us and climbing. The subject aircraft continued to close on us and continued to climb. When it emerged from the clouds, its course was diverging from us at what appeared to be the same altitude. Had I not made a slow descent from 11000 ft, it is my judgement that we would have had a conflict or RA. There was just too much chatter on the radio to question the controller. The conflict aircraft appeared to be a B737 on a westerly heading.

Original NASA ASRS Text

Title: AN APPARENT POTENTIAL CONFLICT BTWN CLBING AND DSNDING TFC IN THE ORD AREA. TA NOT GIVEN.

Narrative: ATC FACILITY: ORD APCH. LOCATION: ORD 220 DEG RADIAL 30 MI. AFTER BEING CLRED TO DSND TO 8000 FT FROM 11000 FT, WE GOT A TA ON THE TCASII AT 12 O'CLOCK, APPROX 4 MI, ABOUT 1000 FT BELOW US AND CLBING. THE SUBJECT ACFT CONTINUED TO CLOSE ON US AND CONTINUED TO CLB. WHEN IT EMERGED FROM THE CLOUDS, ITS COURSE WAS DIVERGING FROM US AT WHAT APPEARED TO BE THE SAME ALT. HAD I NOT MADE A SLOW DSCNT FROM 11000 FT, IT IS MY JUDGEMENT THAT WE WOULD HAVE HAD A CONFLICT OR RA. THERE WAS JUST TOO MUCH CHATTER ON THE RADIO TO QUESTION THE CTLR. THE CONFLICT ACFT APPEARED TO BE A B737 ON A WESTERLY HDG.

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.