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

Attributes
ACN	203079
Time
Date	199202
Day	Wed
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : bwi
State Reference	MD
Altitude	msl bound lower : 19000 msl bound upper : 19000
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Controlling Facilities	artcc : zdc
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	cruise other
Route In Use	enroute : direct
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	cruise other
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	controller : radar
Qualification	controller : radar
Experience	controller radar : 9
ASRS Report	203079
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
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	faa : investigated
Miss Distance	horizontal : 18600 vertical : 0
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Air carrier X was level at FL190 en route from iad to ewr. I gave next sector control to turn him direct ood VORTAC. Meanwhile air carrier Y departed bwi requested FL330. I climbed him to FL190 on a 155 degree heading to miss (go behind) air carrier X and also to fall in trail of another aircraft climbing nebound. I diverted Y attention to 2 other aircraft (a control situation) and noticed conflict alert activation. Immediately descended to FL180 and ended up with 0 ft and 3.1 mi horizontal.

Original NASA ASRS Text

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

Narrative: ACR X WAS LEVEL AT FL190 ENRTE FROM IAD TO EWR. I GAVE NEXT SECTOR CTL TO TURN HIM DIRECT OOD VORTAC. MEANWHILE ACR Y DEPARTED BWI REQUESTED FL330. I CLBED HIM TO FL190 ON A 155 DEG HDG TO MISS (GO BEHIND) ACR X AND ALSO TO FALL IN TRAIL OF ANOTHER ACFT CLBING NEBOUND. I DIVERTED Y ATTN TO 2 OTHER ACFT (A CTL SITUATION) AND NOTICED CONFLICT ALERT ACTIVATION. IMMEDIATELY DSNDED TO FL180 AND ENDED UP WITH 0 FT AND 3.1 MI HORIZ.

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.