Controller observes non participating C172 maneuver in the vicinity of final approach course. TA issued. MD80 pilot reported traffic in sight while conducting the approach.

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Attributes
ACN	426214
Time
Date	199901
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : cvg
State Reference	OH
Altitude	msl bound lower : 3500 msl bound upper : 5500
Environment
Flight Conditions	Marginal
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	MD-80 Series (DC-9-80) Undifferentiated or Other Model
Flight Phase	descent other
Route In Use	arrival other
Flight Plan	IFR
Aircraft 2
Operator	general aviation : personal
Make Model Name	Skyhawk 172/Cutlass 172
Flight Phase	climbout : intermediate altitude cruise other
Flight Plan	VFR
Person 1
Affiliation	government : faa
Function	controller : approach
Experience	controller non radar : 2 controller radar : 15 flight time total : 150
ASRS Report	426214
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	conflict : airborne less severe other anomaly other
Independent Detector	other controllera other flight crewa
Resolutory Action	other
Consequence	Other
Miss Distance	horizontal : 6000 vertical : 0
Supplementary
Air Traffic Incident	other

Narrative:

VFR aircraft Y departed hao (hamilton, oh) to the southwest. The aircraft flew south on the runway 18R final, climbing from 3500 ft to 4500 ft, then turned clockwise to the northeast, climbing eventually to 5500 ft. Aircraft were inbound to cvg from the west, descending to 3000 ft from the south. One MD80 X passed within 1 mi of the VFR aircraft at the same altitude. The flight crew of the MD80 was able to identify the aircraft as a C172. There is too much volume and complexity in the cvg terminal area for ATC not to be in communications with both aircraft.

Original NASA ASRS Text

Title: CTLR OBSERVES NON PARTICIPATING C172 MANEUVER IN THE VICINITY OF FINAL APCH COURSE. TA ISSUED. MD80 PLT RPTED TFC IN SIGHT WHILE CONDUCTING THE APCH.

Narrative: VFR ACFT Y DEPARTED HAO (HAMILTON, OH) TO THE SW. THE ACFT FLEW S ON THE RWY 18R FINAL, CLBING FROM 3500 FT TO 4500 FT, THEN TURNED CLOCKWISE TO THE NE, CLBING EVENTUALLY TO 5500 FT. ACFT WERE INBOUND TO CVG FROM THE W, DSNDING TO 3000 FT FROM THE S. ONE MD80 X PASSED WITHIN 1 MI OF THE VFR ACFT AT THE SAME ALT. THE FLC OF THE MD80 WAS ABLE TO IDENT THE ACFT AS A C172. THERE IS TOO MUCH VOLUME AND COMPLEXITY IN THE CVG TERMINAL AREA FOR ATC NOT TO BE IN COMS WITH BOTH ACFT.

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.