As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE ACCOMP PNC FOR NR 2 ENG PRE COOLER CONT VLV FOUND PRSOV WOULD CYCLE OPEN WHEN APU BLEED WAS APPLIED WITHOUT USING THE MANUAL WRENCH METHOD. REMOVED & REPLACED NR 2 ENG PRSOV LEAK & OPS NORMAL REF M/M 36 11 04 000 801. PRSOV SYS HEALTH CHECK GOOD REF M/M 36 11 00 700 801. GROUND VERIFICATION SUCCESSFUL.