As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT BLEED TRIP OFF LIGHT ILLUMINATED BEGINNING DESCENT FROM FL400. EXTINGUISHED AFTER TRIP RESET WAS PUSHED. REPLACED LEAKING PRSOV AND PRECOOLER CONTROL VALVES. PRSOV NOT SMOOTH PER 36 10 00 810 809 STEP 3B FAILED STEP 5C OF SAME. OPS CHECK NORMAL AFTER REPLACEMENT OF PRSOV AND PRECOOLER VALVE. ENGINE RUN ACCOMPLISHED TO FULL POWER. OPS CHECK NORMAL, MM 71 00 00 AND 36 11 00 710 801.