Less than standard separation between air carrier and another aircraft. Apparent operational error.

Attributes
ACN	187394
Time
Date	199108
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : bwi
State Reference	MD
Altitude	msl bound lower : 10000 msl bound upper : 10000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zdc tracon : bwi
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	cruise other
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 240 flight time total : 8000 flight time type : 3000
ASRS Report	187394
Person 2
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation
Independent Detector	other flight crewa
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Miss Distance	horizontal : 10000 vertical : 0
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error Intra Facility Coordination Failure

Narrative:

Descent clearance to 5000. While slowing at 10000 traffic in control of ZDC passed within 2 mi. We were being controled by baltimore.

Original NASA ASRS Text

Title: LTSS BTWN ACR AND ANOTHER ACFT. APPARENT OPERROR.

Narrative: DSCNT CLRNC TO 5000. WHILE SLOWING AT 10000 TFC IN CTL OF ZDC PASSED WITHIN 2 MI. WE WERE BEING CTLED BY BALTIMORE.

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.