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

Attributes
ACN	183971
Time
Date	199107
Day	Sun
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : eno
State Reference	DE
Altitude	msl bound lower : 15000 msl bound upper : 15000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zdc
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
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	cruise other
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : flight data
Qualification	controller : radar
Experience	controller radar : 21
ASRS Report	183971
Person 2
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Events
Anomaly	conflict : airborne less severe non adherence : published procedure non adherence : required legal separation
Independent Detector	other controllera
Resolutory Action	none taken : unable
Consequence	faa : investigated
Miss Distance	horizontal : 19200 vertical : 500
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Caused by sector overload due to bad tmu procedure and lack of supervisory help. Air carrier X and air carrier Y were vectored too close to each other.

Original NASA ASRS Text

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

Narrative: CAUSED BY SECTOR OVERLOAD DUE TO BAD TMU PROC AND LACK OF SUPERVISORY HELP. ACR X AND ACR Y WERE VECTORED TOO CLOSE TO EACH OTHER.

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.