As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT ENG PRV EICAS ON CLIMB. PERFORMED AIR SUPPLY BITE TEST PER AMM 36-23-00 FOUND L ENG PRV AND PRC FAULTS. REMOVED AND REPLACED LEFT ENG PRV PER AMM 36-11-18. OPS CHECK AND LEAK CHECK GOOD. PART IS UNKNOWN TO TRAX. PRV CONTROLLER ALSO REPLACED.