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

Attributes
ACN	177140
Time
Date	199104
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : ict
State Reference	KS
Altitude	msl bound lower : 35000 msl bound upper : 35000
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zkc
Operator	common carrier : air carrier
Make Model Name	Widebody, Low Wing, 3 Turbojet Eng
Navigation In Use	Other
Flight Phase	cruise other
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	cruise other
Route In Use	enroute : direct
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 8000
ASRS Report	177141
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 : 18000 vertical : 0
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Air carrier X was at FL350 direct garden city. ATC told our aircraft to turn right 20 degrees. After completing the turn ATC told us to turn right another 30 degrees. As air carrier X was completing the turn, ATC told us to continue the turn and report traffic at 12 O'clock, 3 mi. I saw air carrier Y as the captain called it out. Air carrier Y passed safely in front of us, but it appeared at less than the required sep.

Original NASA ASRS Text

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

Narrative: ACR X WAS AT FL350 DIRECT GARDEN CITY. ATC TOLD OUR ACFT TO TURN RIGHT 20 DEGS. AFTER COMPLETING THE TURN ATC TOLD US TO TURN RIGHT ANOTHER 30 DEGS. AS ACR X WAS COMPLETING THE TURN, ATC TOLD US TO CONTINUE THE TURN AND RPT TFC AT 12 O'CLOCK, 3 MI. I SAW ACR Y AS THE CAPT CALLED IT OUT. ACR Y PASSED SAFELY IN FRONT OF US, BUT IT APPEARED AT LESS THAN THE REQUIRED SEP.

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.