Less than standard separation occurred between 2 intrail acrs when reporter attempted action to incr...

Attributes
ACN	327841
Time
Date	199602
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : ott
State Reference	MD
Altitude	msl bound lower : 31000 msl bound upper : 31000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	artcc : zdc
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	cruise other descent other
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller radar : 1
ASRS Report	327841
Person 2
Affiliation	company : air carrier
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	other controllera
Resolutory Action	controller : issued new clearance other
Consequence	Other
Miss Distance	horizontal : 24000 vertical : 1000
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

I just sat down and assumed control of brv, sector 12, at ZDC. After listening to the relief briefing, I had to resolve conflictions with 4 aircraft at FL330. Next I had to increase initial spacing for 2 aircraft to lga. I gave a 90 degree heading and a descent clearance to an aircraft at FL310. I got an override call on the sector, answered the call, and then realized separation was not ensured between the 2 aircraft. I immediately turned and stopped the descent clearance for 1 aircraft and descended another.

Original NASA ASRS Text

Title: LTSS OCCURRED BTWN 2 INTRAIL ACRS WHEN RPTR ATTEMPTED ACTION TO INCREASE SPACING.

Narrative: I JUST SAT DOWN AND ASSUMED CTL OF BRV, SECTOR 12, AT ZDC. AFTER LISTENING TO THE RELIEF BRIEFING, I HAD TO RESOLVE CONFLICTIONS WITH 4 ACFT AT FL330. NEXT I HAD TO INCREASE INITIAL SPACING FOR 2 ACFT TO LGA. I GAVE A 90 DEG HDG AND A DSCNT CLRNC TO AN ACFT AT FL310. I GOT AN OVERRIDE CALL ON THE SECTOR, ANSWERED THE CALL, AND THEN REALIZED SEPARATION WAS NOT ENSURED BTWN THE 2 ACFT. I IMMEDIATELY TURNED AND STOPPED THE DSCNT CLRNC FOR 1 ACFT AND DSNDED ANOTHER.

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.

Less than standard separation occurred between 2 intrail acrs when reporter attempted action to increase spacing.