As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR RETURN DUE TO BLEED 1 OVER PRESSURE. COULD NOT RESET VIA QRH. CMC FAULT CODE 36146225AM1. PERFORMED FIM TASK 36-14-00-810-817-A. FAILURE OF THE OVER PRESSURE SWITCH. R & R 1 BLEED OVER PRESSURE SWITCH IAW AMM 36-14-01-000-801-A & 36-14-01-400-801-A. OPS CHECK GOOD.