As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENGINE BLEED EICAS: BOTH PACKS WORKING OFF OF LEFT BLEED. REPLACED RT PRSOV (PRESSURE REGULATING SHUTOFF VALVE) BUT CONDITION REMAINS. *S/D* CAUSE WAS A DISCRETE LATCHED FAULT IN INPUT/OUTPUT MODUEL IOM M004 IN LEFT AIMS (AIRPLANE INFORMATION MANAGEMENT SYSTEM). A RESET OF THE IOM M004 IN LEFT AIMS.