2 aircraft passed with less than standard radar separation.

Attributes
ACN	149911
Time
Date	199005
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : cvg
State Reference	OH
Altitude	msl bound lower : 31000 msl bound upper : 31000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zid
Operator	general aviation : corporate
Make Model Name	Light Transport, Low Wing, 2 Turbojet Eng
Flight Phase	cruise other
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport
Navigation In Use	Other
Flight Phase	climbout : intermediate altitude cruise other
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
ASRS Report	149911
Person 2
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	conflict : airborne less severe non adherence : published procedure non adherence : required legal separation
Independent Detector	atc equipment other atc equipment : unspecified
Resolutory Action	controller : issued new clearance
Consequence	faa : investigated
Miss Distance	horizontal : 24000
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Light transport was en route from iad via iad/jg hvq J6 bvo at FL310. Medium large transport had departed cvg going cvg hvq DOCC53 iad. Radar controller issued light transport direct bvo, which put light transport approximately 20 mi south of yrk. Medium large transport was climbing to FL290 for crossing FL310 traffic by previous controller. When hvq radar accepted handoff from previous controller, medium large transport was issued FL310 for additional FL290 traffic approximately 60 mi ahead of medium large transport. Radar controller did not consider medium large transport and light transport to be potential traffic for each other, even though they were nearly head-on to each other. Radar controller noticed C/a activated and issued turns to medium large transport, from a 115 degree heading to a 360 degree heading. He also issued turns to light transport from a 265 degree heading to 180 degree heading, however light transport was already switched to the next controller. The sector with data block control noticed that they (medium large transport & light transport) were traffic and he issued the light transport turns to 180 degree heading. The 2 aircraft lost sep before turns could be established. Radar controller was not quite moderately busy; he just overlooked the situation.

Original NASA ASRS Text

Title: 2 ACFT PASSED WITH LESS THAN STANDARD RADAR SEPARATION.

Narrative: LTT WAS ENRTE FROM IAD VIA IAD/JG HVQ J6 BVO AT FL310. MLG HAD DEPARTED CVG GOING CVG HVQ DOCC53 IAD. RADAR CTLR ISSUED LTT DIRECT BVO, WHICH PUT LTT APPROX 20 MI S OF YRK. MLG WAS CLBING TO FL290 FOR XING FL310 TFC BY PREVIOUS CTLR. WHEN HVQ RADAR ACCEPTED HDOF FROM PREVIOUS CTLR, MLG WAS ISSUED FL310 FOR ADDITIONAL FL290 TFC APPROX 60 MI AHEAD OF MLG. RADAR CTLR DID NOT CONSIDER MLG AND LTT TO BE POTENTIAL TFC FOR EACH OTHER, EVEN THOUGH THEY WERE NEARLY HEAD-ON TO EACH OTHER. RADAR CTLR NOTICED C/A ACTIVATED AND ISSUED TURNS TO MLG, FROM A 115 DEG HDG TO A 360 DEG HDG. HE ALSO ISSUED TURNS TO LTT FROM A 265 DEG HDG TO 180 DEG HDG, HOWEVER LTT WAS ALREADY SWITCHED TO THE NEXT CTLR. THE SECTOR WITH DATA BLOCK CTL NOTICED THAT THEY (MLG & LTT) WERE TFC AND HE ISSUED THE LTT TURNS TO 180 DEG HDG. THE 2 ACFT LOST SEP BEFORE TURNS COULD BE ESTABLISHED. RADAR CTLR WAS NOT QUITE MODERATELY BUSY; HE JUST OVERLOOKED THE SITUATION.

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.