Air carrier had TCASII RA on descent.

Attributes
ACN	278785
Time
Date	199407
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : ord
State Reference	IL
Altitude	msl bound lower : 9000 msl bound upper : 9700
Aircraft 1
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
Route In Use	enroute airway : ord
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	278785
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : returned to intended course or assigned course flight crew : took evasive action
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

During descent into ord approach advised us of heavy light aircraft traffic. After receiving clearance from 9000-7000 ft, we received a climb RA and had to climb to 9700 ft to get the clear of traffic. Continued descent with no further problems. The event was at the krena intersection.

Original NASA ASRS Text

Title: ACR HAD TCASII RA ON DSCNT.

Narrative: DURING DSCNT INTO ORD APCH ADVISED US OF HVY LIGHT ACFT TFC. AFTER RECEIVING CLRNC FROM 9000-7000 FT, WE RECEIVED A CLB RA AND HAD TO CLB TO 9700 FT TO GET THE CLR OF TFC. CONTINUED DSCNT WITH NO FURTHER PROBS. THE EVENT WAS AT THE KRENA INTXN.

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.