ZJX controller described conflict when he or she entered wrong altitude in data block; no operationa...

Attributes
ACN	687826
Time
Date	200602
Local Time Of Day	1201 To 1800
Place
Locale Reference	navaid : orl.vortac
State Reference	FL
Altitude	msl single value : 21000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zjx.artcc
Make Model Name	MU-2B 60 Marquise
Operating Under FAR Part	Part 91
Flight Phase	cruise : level
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zjx.artcc
Operator	common carrier : air carrier
Make Model Name	A320
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : departure controller : radar
Qualification	controller : radar
Experience	controller radar : 15 controller time certified in position1 : 8 controller time certified in position2 : 7
ASRS Report	687826
Person 2
Affiliation	other
Function	flight crew : captain oversight : pic
Events
Anomaly	conflict : airborne less severe
Independent Detector	atc equipment : conflict alert other controllera
Resolutory Action	controller : issued alert controller : issued new clearance flight crew : took evasive action
Consequence	faa : investigated
Miss Distance	horizontal : 18000 vertical : 200
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	ATC Human Performance

Narrative:

I was working R57 at XA40. Aircraft X checked in northbound at FL210. Air carrier Y checked in climbing to 16000 ft. I thought I climbed him to FL200 and put '200' in data block. Aircraft X was traffic for air carrier Y; so I called traffic at 11 O'clock position 3-4 mi and to expect higher clear of traffic. Air carrier Y replied he was climbing to FL210. I immediately told him to maintain '200' to which he responded. I also turned both aircraft for separation.

Original NASA ASRS Text

Title: ZJX CTLR DESCRIBED CONFLICT WHEN HE OR SHE ENTERED WRONG ALT IN DATA BLOCK; NO OPERROR RPTED.

Narrative: I WAS WORKING R57 AT XA40. ACFT X CHKED IN NBOUND AT FL210. ACR Y CHKED IN CLBING TO 16000 FT. I THOUGHT I CLBED HIM TO FL200 AND PUT '200' IN DATA BLOCK. ACFT X WAS TFC FOR ACR Y; SO I CALLED TFC AT 11 O'CLOCK POS 3-4 MI AND TO EXPECT HIGHER CLR OF TFC. ACR Y REPLIED HE WAS CLBING TO FL210. I IMMEDIATELY TOLD HIM TO MAINTAIN '200' TO WHICH HE RESPONDED. I ALSO TURNED BOTH ACFT FOR SEPARATION.

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.

ZJX controller described conflict when he or she entered wrong altitude in data block; no operational error reported.