As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BEFORE FLIGHT, THE CREW ABORTED THE TAKEOFF BECAUSE OF A LT LOW PRESSURE PRSOV FAILED. MX SWAPPED THE LT AND RT LOW PRESSURE PRSOV FOR TROUBLE SHOOTING AND RETURNED THE AC TO SERVICE. LT LOW PRESSURE PRSOV FAILED AT LOW POWER. MX REPLACED THE 95HB OVERPRESSURE SWITCH AND WITH OPS CHECKS GOOD RETURNED THE AC TO SERVICE. (K)