ZID controller providing OJT experienced loss of separation with CRJ1 and B737.

Attributes
ACN	585768
Time
Date	200306
Day	Fri
Local Time Of Day	0601 To 1200
Place
State Reference	KY
Altitude	msl single value : 31000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zid.artcc tower : rno.tower
Operator	common carrier : air carrier
Make Model Name	Regional Jet CL65, Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zid.artcc
Operator	common carrier : air carrier
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	descent : intermediate altitude descent : vacating altitude
Route In Use	arrival : on vectors
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
ASRS Report	585768
Person 2
Affiliation	government : faa
Function	controller : radar instruction : trainee
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation
Independent Detector	atc equipment : msaw other controllera
Resolutory Action	flight crew : took evasive action
Consequence	faa : investigated
Miss Distance	horizontal : 28000 vertical : 1600
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

We had 2 air carrier X aircraft going to nashville. Trainee meant to turn one and used the wrong (non-existent) call sign, other air carrier aircraft took turn and turned into other aircraft. It was all about the readback error -- d-side was off in space, no help at all. I was thinking about a training issue (why was he turning him so early) when readback error happened. Trainee was on top of noticing the turn when it happened. D-side might have caught error if he wasn't off in la-la-land.

Original NASA ASRS Text

Title: ZID CTLR PROVIDING OJT EXPERIENCED LOSS OF SEPARATION WITH CRJ1 AND B737.

Narrative: WE HAD 2 ACR X ACFT GOING TO NASHVILLE. TRAINEE MEANT TO TURN ONE AND USED THE WRONG (NON-EXISTENT) CALL SIGN, OTHER ACR ACFT TOOK TURN AND TURNED INTO OTHER ACFT. IT WAS ALL ABOUT THE READBACK ERROR -- D-SIDE WAS OFF IN SPACE, NO HELP AT ALL. I WAS THINKING ABOUT A TRAINING ISSUE (WHY WAS HE TURNING HIM SO EARLY) WHEN READBACK ERROR HAPPENED. TRAINEE WAS ON TOP OF NOTICING THE TURN WHEN IT HAPPENED. D-SIDE MIGHT HAVE CAUGHT ERROR IF HE WASN'T OFF IN LA-LA-LAND.

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.