As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT ENGINE PRV EICAS STATUS MESSAGE ILLUMINATED IN FLIGHT. PERFORMED EICAS MSG ERASE PROCEDURE PER AMM 31-41-00. L ENG PRV STATUS MESSAGE CLEARED. PERFORMED AIR SUPPLY STATUS BITE PER AMM 36-23-00, FOUND L PRV WIRE FAULT. REPLACED K/46 AIR/GROUND RELAY. AIR BITE TEST PASSED. AC REMAINS ETOPS 180.