Radar separation was lost between 2 aircraft under the control of ARTCC radar controller.

Attributes
ACN	147214
Time
Date	199005
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : fwa
State Reference	IN
Altitude	msl bound lower : 20000 msl bound upper : 20000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zau
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	cruise other
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller non radar : 1
ASRS Report	147214
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : airborne less severe non adherence : published procedure non adherence : required legal separation
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance none taken : insufficient time other
Consequence	Other
Miss Distance	horizontal : 22800 vertical : 0
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

An overflt stop at FL200 looking for higher. Aircraft stop under an overflt at FL210. I turned the aircraft at FL200, 15 degrees left to pull him away from the FL210 overflt. The aircraft I turned 15 degrees left headed him in the flight path of an other FL200 overflt. I thought the aircraft I turned would get 5 mi with the FL210 overflt in time to climb above the FL200 traffic, but they didn't. I then turned other FL200 overflt to a 270 degree heading and the aircraft I had turned 15 degrees left to a 180 degree heading, but not in time. Sep was lost--3.8 mi.

Original NASA ASRS Text

Title: RADAR SEPARATION WAS LOST BETWEEN 2 ACFT UNDER THE CTL OF ARTCC RADAR CTLR.

Narrative: AN OVERFLT STOP AT FL200 LOOKING FOR HIGHER. ACFT STOP UNDER AN OVERFLT AT FL210. I TURNED THE ACFT AT FL200, 15 DEGS LEFT TO PULL HIM AWAY FROM THE FL210 OVERFLT. THE ACFT I TURNED 15 DEGS LEFT HEADED HIM IN THE FLT PATH OF AN OTHER FL200 OVERFLT. I THOUGHT THE ACFT I TURNED WOULD GET 5 MI WITH THE FL210 OVERFLT IN TIME TO CLB ABOVE THE FL200 TFC, BUT THEY DIDN'T. I THEN TURNED OTHER FL200 OVERFLT TO A 270 DEG HDG AND THE ACFT I HAD TURNED 15 DEGS LEFT TO A 180 DEG HDG, BUT NOT IN TIME. SEP WAS LOST--3.8 MI.

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.