Aircraft X had less than standard separation from aircraft Y. System error.

Attributes
ACN	204807
Time
Date	199203
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : avl
State Reference	NC
Altitude	msl bound lower : 9000 msl bound upper : 9000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : yvr
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	cruise other
Route In Use	enroute : direct enroute airway : avl
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	cruise other
Route In Use	enroute : direct
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Experience	controller radar : 15
ASRS Report	204807
Person 2
Function	flight crew : single pilot
Qualification	pilot : instrument
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation non adherence : published procedure
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance other
Consequence	faa : investigated
Miss Distance	horizontal : 12000 vertical : 0
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

I was working aircraft X and Y at 9000. I was distracted when new crew came on duty. Looked away from radar. When I saw my aircraft, they were approximately 4 mi and converging. I turned both. They saw each other at about 2 mi. I reported this to my supervisor who filed an error package.

Original NASA ASRS Text

Title: ACFT X HAD LTSS FROM ACFT Y. SYS ERROR.

Narrative: I WAS WORKING ACFT X AND Y AT 9000. I WAS DISTRACTED WHEN NEW CREW CAME ON DUTY. LOOKED AWAY FROM RADAR. WHEN I SAW MY ACFT, THEY WERE APPROX 4 MI AND CONVERGING. I TURNED BOTH. THEY SAW EACH OTHER AT ABOUT 2 MI. I RPTED THIS TO MY SUPVR WHO FILED AN ERROR PACKAGE.

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.