ZID ARTCC radar controller lost required separation during vectors attempt.

Attributes
ACN	573721
Time
Date	200302
Day	Wed
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : zid.artcc
State Reference	OH
Altitude	msl single value : 31000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	artcc : zid.artcc tower : san.tower
Operator	common carrier : air carrier
Make Model Name	MD-80 Series (DC-9-80) Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zid.artcc
Operator	common carrier : air carrier
Make Model Name	B737 Undifferentiated or Other Model
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 military : 4 controller radar : 12
ASRS Report	573721
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation
Independent Detector	atc equipment : conflict alert other controllera
Resolutory Action	controller : issued new clearance
Consequence	faa : investigated
Miss Distance	horizontal : 18000 vertical : 400
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Air carrier X was at FL310 on the cvg arrival route from djb. Air carrier Y was wbound at FL310. Air carrier X was turned 20 degrees left for spacing into cvg. Air carrier Y was overlooked for traffic with air carrier X when conflict alert started, turns were issued to both aircraft. Separation lost during turns. Could have been avoided by descending air carrier X to FL290 at the boundary.

Original NASA ASRS Text

Title: ZID ARTCC RADAR CTLR LOST REQUIRED SEPARATION DURING VECTORS ATTEMPT.

Narrative: ACR X WAS AT FL310 ON THE CVG ARR RTE FROM DJB. ACR Y WAS WBOUND AT FL310. ACR X WAS TURNED 20 DEGS L FOR SPACING INTO CVG. ACR Y WAS OVERLOOKED FOR TFC WITH ACR X WHEN CONFLICT ALERT STARTED, TURNS WERE ISSUED TO BOTH ACFT. SEPARATION LOST DURING TURNS. COULD HAVE BEEN AVOIDED BY DSNDING ACR X TO FL290 AT THE BOUNDARY.

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.