ZID controller experienced operational error with an arrival and departure at 15000 ft.

Attributes
ACN	590551
Time
Date	200308
Day	Thu
Local Time Of Day	1801 To 2400
Place
Locale Reference	navaid : iiu.vortac
State Reference	KY
Altitude	msl bound lower : 14000 msl bound upper : 15000
Aircraft 1
Controlling Facilities	artcc : zid.artcc
Operator	common carrier : air carrier
Make Model Name	Regional Jet CL65, Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	descent : intermediate altitude
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zid.artcc
Operator	general aviation : personal
Make Model Name	Citation I
Operating Under FAR Part	Part 91
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
ASRS Report	590551
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation
Independent Detector	atc equipment : conflict alert aircraft equipment : tcas other controllera
Resolutory Action	flight crew : took evasive action
Consequence	faa : investigated
Miss Distance	horizontal : 18900 vertical : 100
Supplementary
Problem Areas	ATC Human Performance Flight Crew Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

C500 departed louisville and was cleared to 14000 ft. Crj was inbound to cincinnati cleared to 15000 ft. C500 asked to deviate. I cleared him to deviate left and to maintenance 14000 ft. Crj also asked to deviate. I cleared him to deviate left off course and verified the assigned altitude of 15000 ft. When I noticed the C500 above in 14000 ft I asked him to verify 14000 ft. He said he was climbing to 15000 ft. I told him that I had only cleared him to 14000 ft and to maintain 14000 ft. The pilot responded by saying 'well somebody cleared me to 15000 ft.' I called traffic to them both and the crj told me that he had received an RA. The data block showed the crj at 15100 ft. After hearing the tapes, I very clearly issued 14000 ft to the C500 both on initial call and when I reiterated at the time of the deviation request. His readback the second time was not clear and I wasn't able to prevent the situation in time. I thought I was helping by restating the altitude when in fact, it hurt me. The pilot on the other hand, is not held responsible for his actions or his remarks about the situation.

Original NASA ASRS Text

Title: ZID CTLR EXPERIENCED OPERROR WITH AN ARR AND DEP AT 15000 FT.

Narrative: C500 DEPARTED LOUISVILLE AND WAS CLRED TO 14000 FT. CRJ WAS INBOUND TO CINCINNATI CLRED TO 15000 FT. C500 ASKED TO DEVIATE. I CLRED HIM TO DEVIATE L AND TO MAINT 14000 FT. CRJ ALSO ASKED TO DEVIATE. I CLRED HIM TO DEVIATE L OFF COURSE AND VERIFIED THE ASSIGNED ALT OF 15000 FT. WHEN I NOTICED THE C500 ABOVE IN 14000 FT I ASKED HIM TO VERIFY 14000 FT. HE SAID HE WAS CLBING TO 15000 FT. I TOLD HIM THAT I HAD ONLY CLRED HIM TO 14000 FT AND TO MAINTAIN 14000 FT. THE PLT RESPONDED BY SAYING 'WELL SOMEBODY CLRED ME TO 15000 FT.' I CALLED TFC TO THEM BOTH AND THE CRJ TOLD ME THAT HE HAD RECEIVED AN RA. THE DATA BLOCK SHOWED THE CRJ AT 15100 FT. AFTER HEARING THE TAPES, I VERY CLRLY ISSUED 14000 FT TO THE C500 BOTH ON INITIAL CALL AND WHEN I REITERATED AT THE TIME OF THE DEV REQUEST. HIS READBACK THE SECOND TIME WAS NOT CLR AND I WASN'T ABLE TO PREVENT THE SIT IN TIME. I THOUGHT I WAS HELPING BY RESTATING THE ALT WHEN IN FACT, IT HURT ME. THE PLT ON THE OTHER HAND, IS NOT HELD RESPONSIBLE FOR HIS ACTIONS OR HIS REMARKS ABOUT THE SIT.

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.