ZID controller experienced operational error at FL250 when issuing a wrong dir turn instruction.

Attributes
ACN	760210
Time
Date	200710
Place
Locale Reference	navaid : bkw.vortac
State Reference	WV
Altitude	msl single value : 25000
Environment
Flight Conditions	Mixed
Weather Elements	Ice
Light	Night
Aircraft 1
Controlling Facilities	artcc : zid.artcc
Operator	common carrier : air carrier
Make Model Name	Medium Transport Low Wing 2 Turbojet Eng
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Route In Use	departure : on vectors
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zid.artcc
Operator	general aviation : personal
Make Model Name	DC-3/Dakota/Skytrain
Operating Under FAR Part	Part 91
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller radar : 2 controller time certified in position1 : 7
ASRS Report	760210
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation
Independent Detector	other controllera
Resolutory Action	flight crew : took evasive action
Consequence	faa : investigated
Miss Distance	horizontal : 18000 vertical : 500
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Aircraft X northbound at FL250; air carrier Y climbing nebound. Turned air carrier Y wrong direction.

Original NASA ASRS Text

Title: ZID CTLR EXPERIENCED OPERROR AT FL250 WHEN ISSUING A WRONG DIR TURN INSTRUCTION.

Narrative: ACFT X NBOUND AT FL250; ACR Y CLBING NEBOUND. TURNED ACR Y WRONG DIRECTION.

Data retrieved from NASA's ASRS site as of January 2009 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.