Dtw controller experienced operational error at 4300 ft during simultaneous approachs to runways 27L-right when visual approach clearance was issued to wrong runway.

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Attributes
ACN	701623
Time
Date	200606
Local Time Of Day	1201 To 1800
Place
Locale Reference	navaid : dxo.vor
State Reference	MI
Altitude	msl single value : 4300
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : d21.tracon
Operator	common carrier : air taxi
Make Model Name	Regional Jet CL65 Undifferentiated or Other Model
Operating Under FAR Part	Part 135
Flight Phase	descent : approach
Route In Use	approach : visual
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : d21.tracon
Operator	common carrier : air carrier
Make Model Name	A319
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Route In Use	approach : visual
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Experience	controller radar : 14.5
ASRS Report	701623
Person 2
Affiliation	company : air taxi
Function	flight crew : captain oversight : pic
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance flight crew : took evasive action
Consequence	faa : investigated
Miss Distance	horizontal : 7980 vertical : 300
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

I started working final on a southwest flow (runway 22L/27L) running visual approachs to runway 27L. We later changed to a west confign (runway 27L/27L); where I was running visual approachs to runway 27R. I issued traffic landing runway 27L to my aircraft on the visual approach to runway 27R then inadvertently cleared the next aircraft for a visual approach to runway 27L. When I noticed the aircraft going through the runway 27R final; I immediately turned and descended him to get him away from runway 27L traffic. Separation was lost with traffic on the runway 27L final.

Original NASA ASRS Text

Title: DTW CTLR EXPERIENCED OPERROR AT 4300 FT DURING SIMULTANEOUS APCHS TO RWYS 27L-R WHEN VISUAL APCH CLRNC WAS ISSUED TO WRONG RWY.

Narrative: I STARTED WORKING FINAL ON A SW FLOW (RWY 22L/27L) RUNNING VISUAL APCHS TO RWY 27L. WE LATER CHANGED TO A W CONFIGN (RWY 27L/27L); WHERE I WAS RUNNING VISUAL APCHS TO RWY 27R. I ISSUED TFC LNDG RWY 27L TO MY ACFT ON THE VISUAL APCH TO RWY 27R THEN INADVERTENTLY CLRED THE NEXT ACFT FOR A VISUAL APCH TO RWY 27L. WHEN I NOTICED THE ACFT GOING THROUGH THE RWY 27R FINAL; I IMMEDIATELY TURNED AND DSNDED HIM TO GET HIM AWAY FROM RWY 27L TFC. SEPARATION WAS LOST WITH TFC ON THE RWY 27L FINAL.

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.