Less than standard separation occurred between 2 aircraft under the control of ATC controller.

Attributes
ACN	146024
Time
Date	199005
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : ign
State Reference	NY
Altitude	msl bound lower : 7000 msl bound upper : 7000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zbw
Operator	general aviation : personal
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Retractable Gear
Flight Phase	cruise other
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
ASRS Report	146024
Person 2
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : private pilot : instrument
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	Other
Miss Distance	horizontal : 27500 vertical : 0
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

I had just assumed control of position with approximately 7 aircraft. 2 of those aircraft were both at 17000' with about 9 mi latitude sep. The C/a activated as one aircraft made a flight plan turn of 50 degrees, thereby converging him with the second aircraft. I issued left turns to both aircraft to attempt to alleviate situation. Contributing factor was not fully recognizing actual flight plan and associated turns. Suggest to identify each aircraft with individual routine before accepting position.

Original NASA ASRS Text

Title: LESS THAN STANDARD SEPARATION OCCURRED BETWEEN 2 ACFT UNDER THE CTL OF ATC CTLR.

Narrative: I HAD JUST ASSUMED CTL OF POS WITH APPROX 7 ACFT. 2 OF THOSE ACFT WERE BOTH AT 17000' WITH ABOUT 9 MI LAT SEP. THE C/A ACTIVATED AS ONE ACFT MADE A FLT PLAN TURN OF 50 DEGS, THEREBY CONVERGING HIM WITH THE SECOND ACFT. I ISSUED LEFT TURNS TO BOTH ACFT TO ATTEMPT TO ALLEVIATE SITUATION. CONTRIBUTING FACTOR WAS NOT FULLY RECOGNIZING ACTUAL FLT PLAN AND ASSOCIATED TURNS. SUGGEST TO IDENT EACH ACFT WITH INDIVIDUAL ROUTINE BEFORE ACCEPTING POS.

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.