As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON DESCENT L ENG HPSOV CAUTION CAME ON, WENT OUT AT 15-16 THOUSAND. LOCKED L ENG HPSOV IN CLOSED POSITION PER MEL. ACP'D AIR SUPPLY CONTROL SYSTEM BITE TEST PER MM, HAD "HPC" AND "HPSOV" FAULT. ACP'D PNEUMATIC HEALTH CK ON HPSOV-HPC AND PRV-PRC PER MM. HPC FAILED HEALTH CHECK. RPL'D NR 1 ENG HIGH PRESS CONTROLLER PER MM. RECHECKED NEW HPC WITH 118169 HEALTH CHECK TESTER. HPC PASSED, OPERATIONAL AND LEAK CHECK GOOD.