A 6000 flight number is a Mesa or Freedom (normally referred to as freescum) Canadair CRJ 200 or 700. The ICT PHX route was dropped from mainline service some time ago. Most of the expansion of flying for HP has been by the barbie jets with mainline cities turned over entirely to the RJ. Mesa is a substandard operator with poor reliability and inexperienced flightcrews.
The bearing problem has been fixed for some time on the 'bus fleet. United had a larger number of jets affected but we had at least 2 diversions because of the problem.