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

Attributes
ACN	147682
Time
Date	199006
Day	Wed
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : bal
State Reference	MD
Altitude	msl bound lower : 5000 msl bound upper : 6000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : dca tracon : bwi
Operator	common carrier : air carrier
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	climbout : intermediate altitude
Route In Use	enroute : direct enroute : on vectors
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	descent other
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : departure
Qualification	controller : radar
Experience	controller radar : 17
ASRS Report	147682
Person 2
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Events
Anomaly	conflict : airborne less severe non adherence : published procedure non adherence : required legal separation other anomaly other
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance other
Consequence	Other
Miss Distance	horizontal : 12000 vertical : 500
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Inter Facility Coordination Failure Operational Error

Narrative:

I was working the wooly departure sector at bwi approach control. I was controling air carrier X. The aircraft had just entered my airspace at 5000'. I initiated a climb to 7000' although air carrier X was about a half mi from the area that I 'own' that altitude. At the same time arrival controller at dca approach control was working aircraft Y descending to 6000' which strayed from his airspace into mine. I leveled off air carrier X at 5500' and the dca controller turned his aircraft due westbound (air carrier X was due northbound) to pass behind air carrier X. Sep decreased to 2 mi and 500', as opposed to the required 3 mi or 1000' requirement.

Original NASA ASRS Text

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

Narrative: I WAS WORKING THE WOOLY DEP SECTOR AT BWI APCH CTL. I WAS CTLING ACR X. THE ACFT HAD JUST ENTERED MY AIRSPACE AT 5000'. I INITIATED A CLB TO 7000' ALTHOUGH ACR X WAS ABOUT A HALF MI FROM THE AREA THAT I 'OWN' THAT ALT. AT THE SAME TIME ARR CTLR AT DCA APCH CTL WAS WORKING ACFT Y DSNDING TO 6000' WHICH STRAYED FROM HIS AIRSPACE INTO MINE. I LEVELED OFF ACR X AT 5500' AND THE DCA CTLR TURNED HIS ACFT DUE WBND (ACR X WAS DUE NBND) TO PASS BEHIND ACR X. SEP DECREASED TO 2 MI AND 500', AS OPPOSED TO THE REQUIRED 3 MI OR 1000' REQUIREMENT.

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.