Cpr X had less than standard separation from mlt Y. System error.

Attributes
ACN	190579
Time
Date	199110
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : ldn
State Reference	VA
Altitude	msl bound lower : 28000 msl bound upper : 29000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zdc
Operator	general aviation : corporate
Make Model Name	Light Transport, Low Wing, 2 Turbojet Eng
Flight Phase	climbout : intermediate altitude
Route In Use	enroute : direct
Flight Plan	IFR
Aircraft 2
Operator	other
Make Model Name	Military Transport
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 radar : 21
ASRS Report	190579
Person 2
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation non adherence : published procedure
Independent Detector	atc equipment other atc equipment : unspecified
Resolutory Action	controller : issued new clearance other
Consequence	faa : investigated
Miss Distance	horizontal : 24000 vertical : 800
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Traffic was heavy. Cpr X climbing to FL280 req FL390 wbound. Mlt Y was nebound at FL290. My attention was directed to the other side of the sector from these 2. I came back and climbed cpr X to FL350 and went back to other side of sector. I then came back after issuing a clearance and stopped cpr X at FL280. Cpr X was out of 27.8. Cpr X asked for me to say call sign again; I did and restated the altitude and asked what was altitude leaving. Pilot said out of FL28.2 descending to FL280. Conflict alert was activated. I feel enough time was given for cpr X to stop his climb if I had not of had to repeat the call sign and clearance.

Original NASA ASRS Text

Title: CPR X HAD LTSS FROM MLT Y. SYS ERROR.

Narrative: TFC WAS HVY. CPR X CLBING TO FL280 REQ FL390 WBOUND. MLT Y WAS NEBOUND AT FL290. MY ATTN WAS DIRECTED TO THE OTHER SIDE OF THE SECTOR FROM THESE 2. I CAME BACK AND CLBED CPR X TO FL350 AND WENT BACK TO OTHER SIDE OF SECTOR. I THEN CAME BACK AFTER ISSUING A CLRNC AND STOPPED CPR X AT FL280. CPR X WAS OUT OF 27.8. CPR X ASKED FOR ME TO SAY CALL SIGN AGAIN; I DID AND RESTATED THE ALT AND ASKED WHAT WAS ALT LEAVING. PLT SAID OUT OF FL28.2 DSNDING TO FL280. CONFLICT ALERT WAS ACTIVATED. I FEEL ENOUGH TIME WAS GIVEN FOR CPR X TO STOP HIS CLB IF I HAD NOT OF HAD TO REPEAT THE CALL SIGN AND CLRNC.

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.