Less than standard separation between air carrier and military aircraft. Operational error.

Attributes
ACN	90958
Time
Date	198807
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : buf
State Reference	NY
Altitude	msl bound lower : 24300 msl bound upper : 25000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zob
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	descent other
Flight Plan	IFR
Aircraft 2
Operator	other
Make Model Name	Experimental
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller non radar : 3
ASRS Report	90958
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation
Independent Detector	atc equipment other atc equipment : unspecified
Resolutory Action	controller : issued new clearance none taken : insufficient time other
Consequence	faa : investigated
Miss Distance	horizontal : 28200 vertical : 700
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Air carrier X was descending into toronto and military spc Y was an overflt at FL250. The conflict alert went off with 5.5 mi between the aircraft which was when I realized there was a problem. I turned military Y 30 degrees to the left but it was too late. We would up with 700' and 4.7 mi sep. At the time of the incident I was working 22+ aircraft with extreme WX conditions causing deviations and altitude changes, also frequency congestion was somewhat of a factor.

Original NASA ASRS Text

Title: LESS THAN STANDARD SEPARATION BETWEEN ACR AND MIL ACFT. OPERATIONAL ERROR.

Narrative: ACR X WAS DSNDING INTO TORONTO AND MIL SPC Y WAS AN OVERFLT AT FL250. THE CONFLICT ALERT WENT OFF WITH 5.5 MI BTWN THE ACFT WHICH WAS WHEN I REALIZED THERE WAS A PROB. I TURNED MIL Y 30 DEGS TO THE LEFT BUT IT WAS TOO LATE. WE WOULD UP WITH 700' AND 4.7 MI SEP. AT THE TIME OF THE INCIDENT I WAS WORKING 22+ ACFT WITH EXTREME WX CONDITIONS CAUSING DEVIATIONS AND ALT CHANGES, ALSO FREQ CONGESTION WAS SOMEWHAT OF A FACTOR.

Data retrieved from NASA's ASRS site as of August 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.