Atx X had less than standard separation from small aircraft Y. System error.

Attributes
ACN	210667
Time
Date	199205
Day	Thu
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : tpa
State Reference	FL
Altitude	msl bound lower : 2500 msl bound upper : 3000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : tpa
Operator	common carrier : air taxi
Make Model Name	Small Aircraft
Flight Phase	climbout : intermediate altitude
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Operator	general aviation : personal
Make Model Name	Small Aircraft
Flight Phase	cruise other
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : departure
Qualification	controller : radar
Experience	controller military : 5 controller non radar : 5 controller radar : 10
ASRS Report	210667
Person 2
Affiliation	company : air taxi
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation non adherence : published procedure
Independent Detector	other controllera
Resolutory Action	none taken : detected after the fact
Consequence	faa : investigated
Miss Distance	horizontal : 0 vertical : 500
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Atx X departed tpa heading 060 climbing to 1600 untagged via ARTS IIIA. Atx X was radar idented, climbed to 2500 ft (assuming that 99.79 percent of their operations are handled VFR or cancel IFR en route). Atx X tagged up on the wrong position symbol, was quick looked, only to realize atx X was IFR. Atx X did pass 500 ft below small aircraft Y, IFR in the downwind for runway 36R at tpa.

Original NASA ASRS Text

Title: ATX X HAD LTSS FROM SMA Y. SYS ERROR.

Narrative: ATX X DEPARTED TPA HDG 060 CLBING TO 1600 UNTAGGED VIA ARTS IIIA. ATX X WAS RADAR IDENTED, CLBED TO 2500 FT (ASSUMING THAT 99.79 PERCENT OF THEIR OPS ARE HANDLED VFR OR CANCEL IFR ENRTE). ATX X TAGGED UP ON THE WRONG POS SYMBOL, WAS QUICK LOOKED, ONLY TO REALIZE ATX X WAS IFR. ATX X DID PASS 500 FT BELOW SMA Y, IFR IN THE DOWNWIND FOR RWY 36R AT TPA.

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.