Flight Crew Air Transport Pilot (ATP)
Communication Breakdown
Conflict NMAC; Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural FAR; Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter Unstabilized Approach
Flight Crew Became Reoriented; Flight Crew Took Evasive Action
Procedure; Human Factors
On taxi out for the first flight of the day the PIC said we're all adults here and do not need to use certain checklists; but to do it if a Fed was on board. PIC was chronically non sterile during critical phases of flight - discussing women; money; and his prior military service - and insisted on pressing and holding the erase button [on] the CVR after he was non sterile or inappropriate. PIC did not give proper responses on checklists when I insisted we use them - he rarely if ever called for one and needed to be prompted. It was also apparent he was not familiar with the company specific checklists. It seemed at times the PIC could not hear communication from myself or ATC instructions. Distraction in the cockpit was nearly constant. During the arrival and approach segment of the fourth and final leg of our day trip I had the set up correctly and had reviewed the approach. Incidentally; PIC said he briefed the approach earlier and was familiar. We were given a heading to intercept the localizer. PIC called the airport in sight. We were assigned a heading to intercept the localizer and cleared for the visual approach. I noticed PIC began a 20 degree turn away from the assigned heading and the localizer course. I inquired where he was going. He pointed out the window - 12 o'clock - and said the airport was right there. I looked up and saw he was descending toward ZZZ1 and I said so. He said I was wrong at the he was heading for ZZZ; the correct airport; and questioned whether I had the approach set up correctly. I said I had set it up correctly. He became confused and continued his descent and visual approach to ZZZ1. I noted he was heading away from the localizer course. After some hesitation he finally relented and recognized his error. He changed course to intercept the localizer to [the destination]. Still on a heading to intercept; he reached across and pressed and held CVR erase button. Within 5 seconds there was a TA. He looked up and immediately there was an RA 'Climb!' It indicated an aircraft 200 feet below climbing. He hesitated for about 2 seconds; I said 'You gotta climb!' He then pulled back on the yoke without disconnecting the autopilot. We climbed nominally - between 50 and 100 feet. Simultaneously I looked out my right side window and saw a high wing [aircraft] pass 20-50 feet below us.Finally; established on final to and descending through 1200' AGL he said he was glad I was on board for that trip and in order avoid hassle and 'unnecessary scrutiny' instructed me not to file an [report] or report this event to anyone. Then he reached over and pressed the erase button on the CVR.
First Officer reported that due to an unprofessional Captain disregarding the pilot monitoring instructions they encountered a near miss.