Air carrier Y had less than stndard separation from cpr Y. System error.

Attributes
ACN	141286
Time
Date	199004
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : dqo
State Reference	DE
Altitude	msl bound lower : 14000 msl bound upper : 14000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : corporate
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	cruise other
Route In Use	enroute : direct enroute airway : zdc
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 : direct
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller non radar : 1 controller radar : 20
ASRS Report	141286
Person 2
Affiliation	Other
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	none taken : insufficient time
Consequence	faa : investigated
Miss Distance	unspecified : 24000 vertical : 0
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

The control position had been activated for approximately 30 mins, in anticipation of an impending holding situation. I had one aircraft (cpr X, medium large transport) holding at 140 and air carrier Y in trail was subsequently cleared to maintain 140 also. My plan was to clear other traffic traversing the sector at 130 and to descend cpr X to a lower altitude, however, I became involved in other activities and did not accomplish getting the flight to the lower altitude and sep was not maintained at the required standard.

Original NASA ASRS Text

Title: ACR Y HAD LESS THAN STNDARD SEPARATION FROM CPR Y. SYSTEM ERROR.

Narrative: THE CTL POS HAD BEEN ACTIVATED FOR APPROX 30 MINS, IN ANTICIPATION OF AN IMPENDING HOLDING SITUATION. I HAD ONE ACFT (CPR X, MLG) HOLDING AT 140 AND ACR Y IN TRAIL WAS SUBSEQUENTLY CLRED TO MAINTAIN 140 ALSO. MY PLAN WAS TO CLR OTHER TFC TRAVERSING THE SECTOR AT 130 AND TO DSND CPR X TO A LOWER ALT, HOWEVER, I BECAME INVOLVED IN OTHER ACTIVITIES AND DID NOT ACCOMPLISH GETTING THE FLT TO THE LOWER ALT AND SEP WAS NOT MAINTAINED AT THE REQUIRED STANDARD.

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.