Air carrier X had less than standard separation from air carrier Y. System error.

Attributes
ACN	150561
Time
Date	199007
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : puc
State Reference	UT
Altitude	msl bound lower : 33000 msl bound upper : 33000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zlc
Operator	common carrier : air carrier
Make Model Name	Large Transport
Flight Phase	cruise other
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Large Transport
Flight Phase	cruise other
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
ASRS Report	150561
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 other
Consequence	faa : investigated
Miss Distance	horizontal : 25800 vertical : 1300
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

I was working as an 'right' controller traffic was light. Air carrier X and air carrier Y were in conflict at FL330. Air carrier X was asked if he could accept FL370. He replied negative. Air carrier X was turned 30 degree left for traffic. Air carrier X was again turned left to 345 degree heading. Air carrier Y was turned left 20 degrees for traffic. It appeared that this was not going to provide 5 mi lateral sep. Air carrier X was turned right heading 090 degree expedite your turn, descend and maintain FL290 immediately. Air carrier Y climb and maintain FL350 immediately, fly heading 345 degree. Sep was lost at 4.34, 1300' vertical.

Original NASA ASRS Text

Title: ACR X HAD LESS THAN STANDARD SEPARATION FROM ACR Y. SYSTEM ERROR.

Narrative: I WAS WORKING AS AN 'R' CTLR TFC WAS LIGHT. ACR X AND ACR Y WERE IN CONFLICT AT FL330. ACR X WAS ASKED IF HE COULD ACCEPT FL370. HE REPLIED NEGATIVE. ACR X WAS TURNED 30 DEG L FOR TFC. ACR X WAS AGAIN TURNED L TO 345 DEG HDG. ACR Y WAS TURNED L 20 DEGS FOR TFC. IT APPEARED THAT THIS WAS NOT GOING TO PROVIDE 5 MI LATERAL SEP. ACR X WAS TURNED R HDG 090 DEG EXPEDITE YOUR TURN, DSND AND MAINTAIN FL290 IMMEDIATELY. ACR Y CLB AND MAINTAIN FL350 IMMEDIATELY, FLY HDG 345 DEG. SEP WAS LOST AT 4.34, 1300' VERT.

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.