Operational error -- loss of standard separation between air carrier a and cpr B.

Attributes
ACN	279931
Time
Date	199408
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : fkn
State Reference	VA
Altitude	msl bound lower : 15000 msl bound upper : 15000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : fkn
Operator	common carrier : air carrier
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 121
Flight Phase	descent other
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Operator	general aviation : corporate
Make Model Name	Sabreliner 265
Operating Under FAR Part	Part 91
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : flight data
Qualification	controller : radar
Experience	controller radar : 19
ASRS Report	279937
Person 2
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller radar : 20
ASRS Report	279932
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation non adherence : published procedure
Independent Detector	other controllera
Resolutory Action	none taken : insufficient time other
Consequence	Other
Miss Distance	horizontal : 27000 vertical : 300
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

An air carrier flight landing raleigh and being vectored for spacing came within 4-5 mi of a saberliner N265 that was climbing out of norfolk. The sector was very busy at the time with numerous overlapping data blocks. Due to the number of aircraft we ran out of places to put the data blocks and didn't see the situation developing. Supplemental information from acn 279932: I descended air carrier a through cpr B. When I recognized altitude separation might be lost, I tried to vector but I was unsuccessful.

Original NASA ASRS Text

Title: OPERROR -- LOSS OF STANDARD SEPARATION BTWN ACR A AND CPR B.

Narrative: AN ACR FLT LNDG RALEIGH AND BEING VECTORED FOR SPACING CAME WITHIN 4-5 MI OF A SABERLINER N265 THAT WAS CLBING OUT OF NORFOLK. THE SECTOR WAS VERY BUSY AT THE TIME WITH NUMEROUS OVERLAPPING DATA BLOCKS. DUE TO THE NUMBER OF ACFT WE RAN OUT OF PLACES TO PUT THE DATA BLOCKS AND DIDN'T SEE THE SIT DEVELOPING. SUPPLEMENTAL INFO FROM ACN 279932: I DSNDED ACR A THROUGH CPR B. WHEN I RECOGNIZED ALT SEPARATION MIGHT BE LOST, I TRIED TO VECTOR BUT I WAS UNSUCCESSFUL.

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.