Potential conflict between 2 acrs, descending traffic.

Attributes
ACN	273502
Time
Date	199406
Day	Thu
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : zzv
State Reference	OH
Altitude	msl bound lower : 21000 msl bound upper : 21000
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zob artcc : zoa
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	descent other
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	descent other
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller non radar : 2 controller radar : 2
ASRS Report	273502
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation non adherence : published procedure other anomaly other
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance other
Consequence	Other
Miss Distance	horizontal : 18000
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Air carrier X was turned west at FL210 due to a late frequency change by ZID. In an attempt to resequence him, I turned him to a 180 degree heading which turned him towards a descending cmh inbound, air carrier Y. I saw that air carrier Y wasn't descending fast enough, so I issued hard left turns to both aircraft. Separation was lost at 3 mi and '0' ft.

Original NASA ASRS Text

Title: POTENTIAL CONFLICT BTWN 2 ACRS, DSNDING TFC.

Narrative: ACR X WAS TURNED W AT FL210 DUE TO A LATE FREQ CHANGE BY ZID. IN AN ATTEMPT TO RESEQUENCE HIM, I TURNED HIM TO A 180 DEG HDG WHICH TURNED HIM TOWARDS A DSNDING CMH INBOUND, ACR Y. I SAW THAT ACR Y WASN'T DSNDING FAST ENOUGH, SO I ISSUED HARD L TURNS TO BOTH ACFT. SEPARATION WAS LOST AT 3 MI AND '0' FT.

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.