B737 Undifferentiated or Other Model
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 3; Flight Crew Total 14000; Flight Crew Type 1500
Situational Awareness
Conflict NMAC; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Took Evasive Action; Flight Crew Requested ATC Assistance / Clarification
Human Factors
We were on the RNAV (RNP) Runway 31 approach with clearance for that approach when a [warbird] came barreling up in front of us. I saw it on the TCAS turn from white to amber; and then red. At the time; we were IFR; just about to break out into VMC conditions. A minute or two earlier the Tower reported a [warbird] flying in the area; and we got the impression that the Controller personally knew the pilot of the [warbird]. We were on the approach; exactly where we were supposed to be; when the RA happened. I executed a climbing RA (per guidance); and within maybe 40 seconds we got a 'clear of conflict' and were able to continue the approach to an uneventful landing. I never saw the plane; but I have no doubt that it our clearance was not very far apart - probably less than 500 feet. We reported the incident to the Tower; and they in turn said they would report it through their channels.The [warbird] pilot needs to understand that you cannot fly into the approach end of a runway; especially in marginal to IMC conditions.
B737NG First Officer reported a NMAC with a warbird while on final approach.