Controller attempts to turn a commuter light transport for traffic at 12 O'clock, pilot refuses turn...

Attributes
ACN	241404
Time
Date	199305
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : ord
State Reference	IL
Altitude	msl bound lower : 5000 msl bound upper : 5000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : ord tower : hya
Operator	common carrier : air carrier
Make Model Name	Light Transport, High Wing, 2 Turboprop Eng
Flight Phase	cruise other
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	cruise other
Person 1
Affiliation	government : faa
Function	controller : departure
Qualification	controller : radar
Experience	controller radar : 10
ASRS Report	241404
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : airborne less severe non adherence : clearance non adherence : required legal separation
Independent Detector	aircraft equipment other aircraft equipment : unspecified other controllera
Resolutory Action	none taken : unable other
Consequence	Other
Miss Distance	horizontal : 6000 vertical : 0
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation other

Narrative:

I was vectoring air carrier X sbound. I observed traffic 12 O'clock and 4 mi, crossing at the same altitude. To ensure separation, I tried to turn air carrier X behind the possibly conflicting traffic. He told me 'unable due to an RA.' had the pilot complied with my instructions, separation would never have been a factor. However, by the pilot refusing ATC instructions, I feel there may have been a loss of separation.

Original NASA ASRS Text

Title: CTLR ATTEMPTS TO TURN A COMMUTER LTT FOR TFC AT 12 O'CLOCK, PLT REFUSES TURN DUE TO TCASII RA.

Narrative: I WAS VECTORING ACR X SBOUND. I OBSERVED TFC 12 O'CLOCK AND 4 MI, XING AT THE SAME ALT. TO ENSURE SEPARATION, I TRIED TO TURN ACR X BEHIND THE POSSIBLY CONFLICTING TFC. HE TOLD ME 'UNABLE DUE TO AN RA.' HAD THE PLT COMPLIED WITH MY INSTRUCTIONS, SEPARATION WOULD NEVER HAVE BEEN A FACTOR. HOWEVER, BY THE PLT REFUSING ATC INSTRUCTIONS, I FEEL THERE MAY HAVE BEEN A LOSS OF SEPARATION.

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.

Controller attempts to turn a commuter light transport for traffic at 12 O'clock, pilot refuses turn due to TCASII RA.