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

Attributes
ACN	148929
Time
Date	199006
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : cgt
State Reference	IL
Altitude	msl bound lower : 23000 msl bound upper : 24000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zau
Operator	other
Make Model Name	Military Transport
Flight Phase	cruise other
Route In Use	enroute : direct
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	descent other
Route In Use	enroute : direct
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller radar : 3
ASRS Report	148929
Person 2
Affiliation	government : faa
Function	controller : radar
Qualification	controller : developmental
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 other
Consequence	Other
Miss Distance	horizontal : 9600 vertical : 200
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

I was providing training at a radar position. Air carrier Y checked on frequency leveling at FL240 westbound. We had a pointout on mlt X at FL230 eastbound (jot direct fwa). I was in the process of getting 7 mi in trail for aircraft landing at ord. After requesting 7 mi in trail I questioned the coordination on another overflt in our sector, with the middle position coordinator. During this time the trnee issued air carrier Y a clearance to 16000'. Since I was busy with the coordination I missed air carrier Y clearance to 16000' and air carrier Y readback. The ca started to flash as air carrier Y was going through FL235. Putting air carrier Y in conflict with mlt X. The trnee issued air carrier Y a 360 degree heading and asked him to expedite the turn. Air carrier Y didn't acknowledge the clearance. The trnee then reissued an immediate turn to a 360 degree heading. This was too late to provide sep between mlt X and air carrier Y.

Original NASA ASRS Text

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

Narrative: I WAS PROVIDING TRNING AT A RADAR POS. ACR Y CHKED ON FREQ LEVELING AT FL240 WBND. WE HAD A POINTOUT ON MLT X AT FL230 EBND (JOT DIRECT FWA). I WAS IN THE PROCESS OF GETTING 7 MI IN TRAIL FOR ACFT LNDG AT ORD. AFTER REQUESTING 7 MI IN TRAIL I QUESTIONED THE COORD ON ANOTHER OVERFLT IN OUR SECTOR, WITH THE MIDDLE POS COORDINATOR. DURING THIS TIME THE TRNEE ISSUED ACR Y A CLRNC TO 16000'. SINCE I WAS BUSY WITH THE COORD I MISSED ACR Y CLRNC TO 16000' AND ACR Y READBACK. THE CA STARTED TO FLASH AS ACR Y WAS GOING THROUGH FL235. PUTTING ACR Y IN CONFLICT WITH MLT X. THE TRNEE ISSUED ACR Y A 360 DEG HDG AND ASKED HIM TO EXPEDITE THE TURN. ACR Y DIDN'T ACKNOWLEDGE THE CLRNC. THE TRNEE THEN REISSUED AN IMMEDIATE TURN TO A 360 DEG HDG. THIS WAS TOO LATE TO PROVIDE SEP BTWN MLT X AND ACR Y.

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.