Small aircraft X had near midair collision with small aircraft Y in TCA. System error.

Attributes
ACN	211040
Time
Date	199205
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : tpa
State Reference	FL
Altitude	msl bound lower : 3300 msl bound upper : 3300
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : tpa
Operator	general aviation : personal
Make Model Name	Small Aircraft, Low Wing, 2 Eng, Retractable Gear
Flight Phase	climbout : intermediate altitude
Route In Use	enroute : on vectors
Flight Plan	None
Aircraft 2
Operator	general aviation : personal
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Retractable Gear
Flight Phase	climbout : intermediate altitude
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : atp
ASRS Report	211040
Person 2
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : instrument
Events
Anomaly	conflict : nmac non adherence : published procedure non adherence : required legal separation
Independent Detector	other flight crewa
Resolutory Action	none taken : unable
Consequence	faa : investigated faa : reviewed incident with flight crew
Miss Distance	horizontal : 400 vertical : 0
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Small aircraft X climbing to 3500 assigned altitude, small aircraft Y flew by close on starboard side. Called 'near miss' and requested to talk to supervisor on another channel. On arrival at avl called tower at tpa. Supervisor advised me that there had been an operational error. No TA's issued to either aircraft. Small aircraft Y was climbing to 4000.

Original NASA ASRS Text

Title: SMA X HAD NMAC WITH SMA Y IN TCA. SYS ERROR.

Narrative: SMA X CLBING TO 3500 ASSIGNED ALT, SMA Y FLEW BY CLOSE ON STARBOARD SIDE. CALLED 'NEAR MISS' AND REQUESTED TO TALK TO SUPVR ON ANOTHER CHANNEL. ON ARR AT AVL CALLED TWR AT TPA. SUPVR ADVISED ME THAT THERE HAD BEEN AN OPERROR. NO TA'S ISSUED TO EITHER ACFT. SMA Y WAS CLBING TO 4000.

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.