A faster cga overtook the first aircraft resulting in less than standard separation.

Attributes
ACN	126005
Time
Date	198910
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : ldg
State Reference	VA
Altitude	msl bound lower : 18000 msl bound upper : 18000
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Controlling Facilities	artcc : zdc
Operator	other
Make Model Name	Military Transport
Flight Phase	cruise other
Flight Plan	IFR
Aircraft 2
Operator	general aviation : corporate
Make Model Name	Light Transport, Low Wing, 2 Turbojet Eng
Flight Phase	climbout : intermediate altitude
Route In Use	departure other
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
ASRS Report	126005
Person 2
Affiliation	government : military
Function	flight crew : captain oversight : pic
Qualification	pilot : military
Events
Anomaly	conflict : airborne less severe non adherence : published procedure non adherence : required legal separation
Independent Detector	atc equipment other atc equipment : unspecified other controllera
Resolutory Action	controller : issued new clearance
Consequence	Other
Miss Distance	horizontal : 17400 vertical : 400
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

I was working linden radar and climbed mlt X to FL260 established on J149. National approach called appreqing FL190 to cga Y which I approved since I thought cga Y was flying J134, a diverging airway from J149. After cga Y check on flying approximately 200 KTS faster than mlt X and realizing the aircraft were on the same airway, I turned cga Y 30 degree left and mlt X 15 degree right. With the halo and getting closer, I expedited mlt X's climb, and descended cga Y to FL180 to reestablish 1000' separation. Even after I had lost 5 mi separation I knew I had to try and get separation again. The closest the aircraft came together 2AS 2.9 mi and 400'. Being newly checked out on radar sector I feel it's my lack of experience and seasoning at the sector which made this occur, last time I worked linden was 19 days ago and that was only for 1 hour if that. I don't have the familiarity on the position to remain comfortable and current. To prevent this occurring again I think it's important to have more staffing time on the sector I was checked out on instead of going 2 1/2 weeks without working it. Also I should have turned cga Y right and get 5 mi on the north side of mlt X and paralleled that way.

Original NASA ASRS Text

Title: A FASTER CGA OVERTOOK THE FIRST ACFT RESULTING IN LESS THAN STANDARD SEPARATION.

Narrative: I WAS WORKING LINDEN RADAR AND CLIMBED MLT X TO FL260 ESTABLISHED ON J149. NATIONAL APCH CALLED APPREQING FL190 TO CGA Y WHICH I APPROVED SINCE I THOUGHT CGA Y WAS FLYING J134, A DIVERGING AIRWAY FROM J149. AFTER CGA Y CHECK ON FLYING APPROX 200 KTS FASTER THAN MLT X AND REALIZING THE ACFT WERE ON THE SAME AIRWAY, I TURNED CGA Y 30 DEG LEFT AND MLT X 15 DEG RIGHT. WITH THE HALO AND GETTING CLOSER, I EXPEDITED MLT X'S CLIMB, AND DESCENDED CGA Y TO FL180 TO REESTABLISH 1000' SEPARATION. EVEN AFTER I HAD LOST 5 MI SEPARATION I KNEW I HAD TO TRY AND GET SEPARATION AGAIN. THE CLOSEST THE ACFT CAME TOGETHER 2AS 2.9 MI AND 400'. BEING NEWLY CHECKED OUT ON RADAR SECTOR I FEEL IT'S MY LACK OF EXPERIENCE AND SEASONING AT THE SECTOR WHICH MADE THIS OCCUR, LAST TIME I WORKED LINDEN WAS 19 DAYS AGO AND THAT WAS ONLY FOR 1 HR IF THAT. I DON'T HAVE THE FAMILIARITY ON THE POSITION TO REMAIN COMFORTABLE AND CURRENT. TO PREVENT THIS OCCURRING AGAIN I THINK IT'S IMPORTANT TO HAVE MORE STAFFING TIME ON THE SECTOR I WAS CHECKED OUT ON INSTEAD OF GOING 2 1/2 WEEKS WITHOUT WORKING IT. ALSO I SHOULD HAVE TURNED CGA Y RIGHT AND GET 5 MI ON THE N SIDE OF MLT X AND PARALLELED THAT WAY.

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.