Operational error occurred between aircraft X and aircraft Y.

Attributes
ACN	462796
Time
Date	200002
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	navaid : ott.vortac
State Reference	MD
Altitude	msl bound lower : 34000 msl bound upper : 35000
Environment
Light	Night
Aircraft 1
Controlling Facilities	artcc : zdc.artcc
Operator	general aviation : corporate
Make Model Name	Challenger Jet Undifferentiated or Other Model
Operating Under FAR Part	Part 91
Flight Phase	descent : vacating altitude
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zdc.artcc
Operator	common carrier : air carrier
Make Model Name	MD-80 Super 80
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : non radar
Qualification	controller : non radar
Experience	controller radar : 22
ASRS Report	462796
Person 2
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation
Independent Detector	atc equipment other atc equipment : edp other controllera other controllerb
Resolutory Action	none taken : insufficient time
Consequence	faa : investigated
Miss Distance	horizontal : 19800 vertical : 1700
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

I was doing 'D' side duties. I was marking strips, sequencing strips, listening to 'right' side xmissions, and aircraft readbacks. There were 2 bays of flight plan strips and I was looking back and forth between the radar scope and the flight plan strips. I then heard the 'right' side controller give aircraft X left turn of 20 degrees and aircraft Y a heading of 090 degrees. The 2 aircraft lost separation. Aircraft X FL340 down to FL330 and aircraft Y, at FL350.

Original NASA ASRS Text

Title: OPERROR OCCURRED BTWN ACFT X AND ACFT Y.

Narrative: I WAS DOING 'D' SIDE DUTIES. I WAS MARKING STRIPS, SEQUENCING STRIPS, LISTENING TO 'R' SIDE XMISSIONS, AND ACFT READBACKS. THERE WERE 2 BAYS OF FLT PLAN STRIPS AND I WAS LOOKING BACK AND FORTH BTWN THE RADAR SCOPE AND THE FLT PLAN STRIPS. I THEN HEARD THE 'R' SIDE CTLR GIVE ACFT X L TURN OF 20 DEGS AND ACFT Y A HEADING OF 090 DEGS. THE 2 ACFT LOST SEPARATION. ACFT X FL340 DOWN TO FL330 AND ACFT Y, AT FL350.

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.