SF34 PIC initiates TCASII evasive maneuver for issued, but not sighted, traffic when turning final for fsd. PIC concerned with perceived poor interfacility coordination.

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Attributes
ACN	453566
Time
Date	199910
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : fsd.airport
State Reference	SD
Altitude	msl bound lower : 2200 msl bound upper : 2500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : fsd.tracon tower : fsd.tower
Operator	common carrier : air carrier
Make Model Name	SF 340B
Operating Under FAR Part	Part 121
Flight Phase	descent : vacating altitude descent : approach
Route In Use	approach : visual
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tower : fsd.tower
Operator	general aviation : personal
Make Model Name	Skyhawk 172/Cutlass 172
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Route In Use	approach : traffic pattern
Flight Plan	VFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 250 flight time total : 4500 flight time type : 2000
ASRS Report	453566
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : commercial
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : nmac non adherence : required legal separation non adherence : published procedure other anomaly other spatial deviation
Independent Detector	aircraft equipment : tcas other flight crewa
Resolutory Action	controller : issued alert flight crew : took evasive action flight crew : returned to original clearance
Miss Distance	horizontal : 100 vertical : 400
Supplementary
Problem Areas	Airspace Structure Airport Flight Crew Human Performance ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Inter Facility Coordination Failure

Narrative:

Upon being cleared for a visual approach into fsd, we (aircraft X) were granted permission to enter right traffic (base) to runway 33. Just prior to entering class D airspace and turning final, we were advised of traffic (aircraft Y) and told to switch to tower. At the same time, TCASII alerted us of traffic. Visual scanning was employed to no avail. Less than 3 seconds later, an RA on TCASII was indicated. Evasive action was taken without traffic ever being seen. Approach was altered and a safe landing was made. It wasn't known by my crew if the other aircraft had visual contact with us or not. Tower was in contact with a cessna and was unable to advise us of traffic until after the RA because of close proximity to aircraft. (It seemed communication between approach control and tower control was inappropriate and lacking. Without TCASII or with a deferred TCASII, a midair collision might have occurred.

Original NASA ASRS Text

Title: SF34 PIC INITIATES TCASII EVASIVE MANEUVER FOR ISSUED, BUT NOT SIGHTED, TFC WHEN TURNING FINAL FOR FSD. PIC CONCERNED WITH PERCEIVED POOR INTERFAC COORD.

Narrative: UPON BEING CLRED FOR A VISUAL APCH INTO FSD, WE (ACFT X) WERE GRANTED PERMISSION TO ENTER R TFC (BASE) TO RWY 33. JUST PRIOR TO ENTERING CLASS D AIRSPACE AND TURNING FINAL, WE WERE ADVISED OF TFC (ACFT Y) AND TOLD TO SWITCH TO TWR. AT THE SAME TIME, TCASII ALERTED US OF TFC. VISUAL SCANNING WAS EMPLOYED TO NO AVAIL. LESS THAN 3 SECONDS LATER, AN RA ON TCASII WAS INDICATED. EVASIVE ACTION WAS TAKEN WITHOUT TFC EVER BEING SEEN. APCH WAS ALTERED AND A SAFE LNDG WAS MADE. IT WASN'T KNOWN BY MY CREW IF THE OTHER ACFT HAD VISUAL CONTACT WITH US OR NOT. TWR WAS IN CONTACT WITH A CESSNA AND WAS UNABLE TO ADVISE US OF TFC UNTIL AFTER THE RA BECAUSE OF CLOSE PROX TO ACFT. (IT SEEMED COM BTWN APCH CTL AND TWR CTL WAS INAPPROPRIATE AND LACKING. WITHOUT TCASII OR WITH A DEFERRED TCASII, A MIDAIR COLLISION MIGHT HAVE OCCURRED.

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.