As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 PRSOV INTERMITTENT OPERATION WHEN CHECKING IDLE RUN AIR PRESSURE. REMOVED NR2 PRSOV VALVE. RPLD NR 2 PRSOV. ACCOMPLISHED POWER RUN. NR 2 BLEED OPS CHECKED GOOD AT POWER. OVERNIGHT TROUBLESHOOTING IDENTIFIES PROBLEM AS BLEED PRESSURE DROPPING OFF TO MINIMUM WHEN THROTTLE RETARDED: HPSOV APPEARS INOPERATIVE. LOCKED VALVE CLOSED, DEFERRED. REPLACED HPSOV AND HPC. DUCT PSI NORMAL, RT PACK OPS NORMAL.