TA given, not sighted. TCASII RA climb taken to avoid small aircraft mnv.

Attributes
ACN	196215
Time
Date	199112
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : sdf
State Reference	KY
Altitude	msl bound lower : 4000 msl bound upper : 4000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : sdf
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	descent : approach
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Operator	general aviation : instructional
Make Model Name	Small Aircraft, High Wing, 1 Eng, Fixed Gear
Flight Phase	cruise other
Flight Plan	None
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : commercial pilot : flight engineer pilot : cfi
Experience	flight time last 90 days : 170 flight time total : 9000 flight time type : 1000
ASRS Report	196215
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

While being vectored on an extended downwind for runway 19 on the east side of ksdf over the river, we were issued VFR traffic at 3600 ft at our 12 O'clock position, 3 mi. We did not find the traffic visually and I requested a turn from approach. We were issued a left turn of 20 degrees. TCASII showed what the controller conformed, that the traffic was turning east and would pass off our right. Next we noticed the TCASII target encroaching our flight path projecting a loss of separation. TCASII issued a TA and then immediately issued an RA 'climb.' the crew responded and the copilot initiated a climb of 1500 FPM for 500 ft. TCASII downgraded to a 'monitor vertical speed', we leveled and then immediately descended to our original altitude of 4000 ft. We advised ATC as soon as possible of our deviation and there was no further discussion with ATC of the excursion. We did require the small aircraft visually just before the TA. He was doing 360 degree turns at approximately 30 degrees of bank.

Original NASA ASRS Text

Title: TA GIVEN, NOT SIGHTED. TCASII RA CLB TAKEN TO AVOID SMA MNV.

Narrative: WHILE BEING VECTORED ON AN EXTENDED DOWNWIND FOR RWY 19 ON THE E SIDE OF KSDF OVER THE RIVER, WE WERE ISSUED VFR TFC AT 3600 FT AT OUR 12 O'CLOCK POS, 3 MI. WE DID NOT FIND THE TFC VISUALLY AND I REQUESTED A TURN FROM APCH. WE WERE ISSUED A L TURN OF 20 DEGS. TCASII SHOWED WHAT THE CTLR CONFORMED, THAT THE TFC WAS TURNING E AND WOULD PASS OFF OUR R. NEXT WE NOTICED THE TCASII TARGET ENCROACHING OUR FLT PATH PROJECTING A LOSS OF SEPARATION. TCASII ISSUED A TA AND THEN IMMEDIATELY ISSUED AN RA 'CLB.' THE CREW RESPONDED AND THE COPLT INITIATED A CLB OF 1500 FPM FOR 500 FT. TCASII DOWNGRADED TO A 'MONITOR VERT SPD', WE LEVELED AND THEN IMMEDIATELY DSNDED TO OUR ORIGINAL ALT OF 4000 FT. WE ADVISED ATC AS SOON AS POSSIBLE OF OUR DEV AND THERE WAS NO FURTHER DISCUSSION WITH ATC OF THE EXCURSION. WE DID REQUIRE THE SMA VISUALLY JUST BEFORE THE TA. HE WAS DOING 360 DEG TURNS AT APPROX 30 DEGS OF BANK.

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.