Cessna 310/T310C
Flight Crew Air Transport Pilot (ATP); Flight Crew Flight Instructor; Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Last 90 Days 20; Flight Crew Total 3000; Flight Crew Type 300
Communication Breakdown
ATC Issue All Types; Conflict NMAC
Air Traffic Control Issued New Clearance; Flight Crew Took Evasive Action
Human Factors
We were cleared for the GPS Approach by TRACON. The traffic alert was displayed on the Garmin G500 TXI and GTN 750 before the FAF. The alert indicated a yellow TA of -100 FT at 12 o' clock. I took immediate evasive action and turned right 30 degrees and arrested my descent on final approach. The conflict aircraft was under the left wing and below us. I believe that we would have collided with each other had I not taken evasive action. At that point I requested a go around for a fresh approach. In retrospect; the controller should have canceled our approach clearance well before the possible collision or at least could have issued a vector for collision avoidance with an immediate climb. As a further note; a 'senior' controller then took over and issued a clearance to an IAF for another attempt. He in effect relieved the younger sounding controller.
C310 pilot reported taking evasive action for a near mid-air collision on approach that was not resolved by ATC.