As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMBOUT, CREW WAS UNABLE TO CONTROL CABIN PRESSURE USING AUTO AND STANDBY MODES. AIRCRAFT RETURNED TO SLC AND MADE AN UNEVENTFUL LANDING. PERFORMED PRESSURE CONTROL SYSTEM TEST, NO DEFECTS NOTED. FOUND NR 2 ENGINE BLEED CONTROL C/B CONTINUALLY TRIPPING. REPAIRED WIRING AT NR 2 ENGINE PRSOV WIRING HARNESS PER BOEING M/M.