Air carrier Y TCASII TA evasive action taken from small aircraft X in TCA. System error.

Attributes
ACN	235749
Time
Date	199303
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : msp
State Reference	MN
Altitude	msl bound lower : 2500 msl bound upper : 2500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : msp tower : msp
Operator	general aviation : personal
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Fixed Gear
Flight Phase	climbout : initial
Route In Use	enroute : on vectors
Flight Plan	VFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Widebody, Low Wing, 3 Turbojet Eng
Navigation In Use	Other
Flight Phase	climbout : initial
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 12000 flight time type : 3000
ASRS Report	235749
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	conflict : airborne less severe non adherence : clearance non adherence : published procedure non adherence : required legal separation other spatial deviation
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 2000
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error Intra Facility Coordination Failure

Narrative:

Small aircraft X takes off, an medium large transport lands, air carrier Y takes off after medium large transport clears runway. No warning from tower about slow small aircraft X ahead on our departure. Small aircraft X (come to find out) had a runway heading climb to 3000 ft clearance. At about 2200 ft during flap cleanup I got a TCASII TA about 2 mi ahead, slightly left of course and 400 ft above. I immediately acquired small aircraft X visually and took evasive action, a 30 degree turn to the right holding the climb as is. Missed by 1/4 mi horizontal 0 ft vertical.

Original NASA ASRS Text

Title: ACR Y TCASII TA EVASIVE ACTION TAKEN FROM SMA X IN TCA. SYS ERROR.

Narrative: SMA X TAKES OFF, AN MLG LANDS, ACR Y TAKES OFF AFTER MLG CLRS RWY. NO WARNING FROM TWR ABOUT SLOW SMA X AHEAD ON OUR DEP. SMA X (COME TO FIND OUT) HAD A RWY HDG CLB TO 3000 FT CLRNC. AT ABOUT 2200 FT DURING FLAP CLEANUP I GOT A TCASII TA ABOUT 2 MI AHEAD, SLIGHTLY L OF COURSE AND 400 FT ABOVE. I IMMEDIATELY ACQUIRED SMA X VISUALLY AND TOOK EVASIVE ACTION, A 30 DEG TURN TO THE R HOLDING THE CLB AS IS. MISSED BY 1/4 MI HORIZ 0 FT VERT.

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.