Controller report reference TCASII response which he feels was unnecessary.

Attributes
ACN	278277
Time
Date	199407
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : cvg
State Reference	OH
Altitude	msl bound lower : 4400 msl bound upper : 5200
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : cvg artcc : zny
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	descent : approach descent other
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	climbout : intermediate altitude
Flight Plan	VFR
Person 1
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
ASRS Report	278277
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course flight crew : took evasive action
Consequence	Other
Miss Distance	vertical : 600
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Air carrier, md-88, at 5000 ft. Observed VFR traffic squawking 1200 indicating 4200 ft. Issued traffic to air carrier and turned air carrier to join localizer. As VFR traffic climbed to 4400 ft, air carrier advised he was responding to an RA, and I observed him climbing to 5200 ft. As paths diverged, the VFR was indicating 4400 ft. With assigned altitude of 5000 ft, a 500 ft minimum vertical separation was insured. Suggest traffic either turn off TCASII or use advisory mode only in terminal environment. This TCASII resolution was unnecessary.

Original NASA ASRS Text

Title: CTLR RPT REF TCASII RESPONSE WHICH HE FEELS WAS UNNECESSARY.

Narrative: ACR, MD-88, AT 5000 FT. OBSERVED VFR TFC SQUAWKING 1200 INDICATING 4200 FT. ISSUED TFC TO ACR AND TURNED ACR TO JOIN LOC. AS VFR TFC CLBED TO 4400 FT, ACR ADVISED HE WAS RESPONDING TO AN RA, AND I OBSERVED HIM CLBING TO 5200 FT. AS PATHS DIVERGED, THE VFR WAS INDICATING 4400 FT. WITH ASSIGNED ALT OF 5000 FT, A 500 FT MINIMUM VERT SEPARATION WAS INSURED. SUGGEST TFC EITHER TURN OFF TCASII OR USE ADVISORY MODE ONLY IN TERMINAL ENVIRONMENT. THIS TCASII RESOLUTION WAS UNNECESSARY.

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.