ZID controller experienced operational error at 15000 ft with 2 crossing aircraft.

Attributes
ACN	632186
Time
Date	200409
Day	Thu
Local Time Of Day	1801 To 2400
Place
Locale Reference	navaid : tvt.vor
State Reference	ON
Altitude	agl single value : 15000
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Controlling Facilities	artcc : zid.artcc
Operator	general aviation : personal
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	descent : intermediate altitude
Route In Use	arrival star : n/a
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zid.artcc
Operator	general aviation : personal
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller limited radar : 3 controller non radar : 3 controller radar : 1 controller time certified in position2 : 9
ASRS Report	632186
Person 2
Affiliation	other
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation
Independent Detector	atc equipment : conflict alert other controllera
Resolutory Action	flight crew : took evasive action
Consequence	faa : investigated
Miss Distance	horizontal : 25200 vertical : 0
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Aircraft #1 was northbound descending out of FL240. Aircraft #2 was climbing eastbound over tvt VOR. When I examined the routes, aircraft #1 should have passed behind aircraft #2. Aircraft #1 crossed tvt still descending to 15000 ft and turned northeast to join the arrival route into cle. When aircraft made the turn, separation was lost. Had aircraft #1 been on present heading the error would not have occurred.

Original NASA ASRS Text

Title: ZID CTLR EXPERIENCED OPERROR AT 15000 FT WITH 2 XING ACFT.

Narrative: ACFT #1 WAS NBOUND DSNDING OUT OF FL240. ACFT #2 WAS CLBING EBOUND OVER TVT VOR. WHEN I EXAMINED THE ROUTES, ACFT #1 SHOULD HAVE PASSED BEHIND ACFT #2. ACFT #1 CROSSED TVT STILL DSNDING TO 15000 FT AND TURNED NE TO JOIN THE ARR RTE INTO CLE. WHEN ACFT MADE THE TURN, SEPARATION WAS LOST. HAD ACFT #1 BEEN ON PRESENT HDG THE ERROR WOULD NOT HAVE OCCURRED.

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.