Large Transport; Low Wing; 2 Turbojet Eng
Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 461
Conflict NMAC; Deviation / Discrepancy - Procedural Clearance
Air Traffic Control Issued Advisory / Alert; Flight Crew Took Evasive Action
Airspace Structure; Human Factors
We were cleared for the RNAV RNP Z 20R from JOGLO. Approach Control had been advising another Company aircraft landscape north on 20L of a small aircraft that had penetrated the Class C and advised them that the aircraft's location was on final to 20L tracking west. We knew that aircraft would be an issue for us and I (PM; Pilot Monitoring) began to scan for the traffic. Approach then advised us that after 90 degrees the aircraft would be on/near our course. I spotted the aircraft and advised the PF (Pilot Flying) to arrest the rate of descent and they used V/S. As they did we got a TA and then immediately following an RA to not descend. The PF never got sight of the traffic but I felt the corrections were proper. In my estimation the traffic flew 200 feet below us on the approach course; and with Approach Control's help and the RA; this would have been a near miss. On landing we received an FAA phone number and after we had parked the aircraft I called and reported my recollection to them.I am unable to provide insight because this was an aircraft that wasn't talking to ATC. The traffic was a threat and we all worked together to maintain safety of flight.
Air carrier Captain reported an NMAC on approach with aircraft that penetrated BNA airport airspace.