Air carrier has TCASII TA, RA on approach.

Attributes
ACN	226142
Time
Date	199211
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : azo
State Reference	MI
Altitude	msl bound lower : 2000 msl bound upper : 2500
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : azo
Operator	common carrier : air carrier
Make Model Name	Medium Transport
Navigation In Use	Other
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 4200 flight time type : 900
ASRS Report	226142
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	non adherence : published procedure non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 6000 vertical : 500
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

We were cleared for an approach into azo. The primary azo radar was OTS. Inside the air traffic area we had a TCASII TA. We then got a TCASII RA telling us to climb. We climbed, never saw the traffic. ATC never told us about the traffic. Azo has a lot of single engine traffic. A university flight school is at the airport. The pilot of the other aircraft was in an air traffic area and not talking to anyone.

Original NASA ASRS Text

Title: ACR HAS TCASII TA, RA ON APCH.

Narrative: WE WERE CLRED FOR AN APCH INTO AZO. THE PRIMARY AZO RADAR WAS OTS. INSIDE THE ATA WE HAD A TCASII TA. WE THEN GOT A TCASII RA TELLING US TO CLB. WE CLBED, NEVER SAW THE TFC. ATC NEVER TOLD US ABOUT THE TFC. AZO HAS A LOT OF SINGLE ENG TFC. A UNIVERSITY FLT SCHOOL IS AT THE ARPT. THE PLT OF THE OTHER ACFT WAS IN AN ATA AND NOT TALKING TO ANYONE.

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.