Cpr Y descended through air carrier X's altitude without standard separation. System error.

Attributes
ACN	114732
Time
Date	198906
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : swl
State Reference	MD
Altitude	msl bound lower : 25000 msl bound upper : 25000
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
Flight Phase	cruise other
Route In Use	enroute : direct
Flight Plan	IFR
Aircraft 2
Operator	general aviation : corporate
Make Model Name	Light Transport, Low Wing, 2 Turbojet Eng
Flight Phase	descent other
Route In Use	enroute : direct
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : non radar
Qualification	controller : non radar
ASRS Report	114732
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	atc equipment other atc equipment : unspecified
Resolutory Action	none taken : unable
Consequence	faa : investigated
Miss Distance	horizontal : 24000 vertical : 0
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Intra Facility Coordination Failure Operational Error

Narrative:

I was working the d-side or manual position. The newly checked out fpl forgot air carrier X at FL250 while descending cpr X to FL240. I was performing d-side function when a C/a activated and caught my eye, bringing my attention to the radar. At this time, air carrier X at FL250 was northbound deviating around a trw. Cpr Y was southbound out of FL250 descending. They were separated approximately 4 mi latitude. We need 5 mi.

Original NASA ASRS Text

Title: CPR Y DESCENDED THROUGH ACR X'S ALT WITHOUT STANDARD SEPARATION. SYSTEM ERROR.

Narrative: I WAS WORKING THE D-SIDE OR MANUAL POS. THE NEWLY CHKED OUT FPL FORGOT ACR X AT FL250 WHILE DSNDING CPR X TO FL240. I WAS PERFORMING D-SIDE FUNCTION WHEN A C/A ACTIVATED AND CAUGHT MY EYE, BRINGING MY ATTN TO THE RADAR. AT THIS TIME, ACR X AT FL250 WAS NBOUND DEVIATING AROUND A TRW. CPR Y WAS SBND OUT OF FL250 DSNDING. THEY WERE SEPARATED APPROX 4 MI LAT. WE NEED 5 MI.

Data retrieved from NASA's ASRS site as of August 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.