As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LOW LT ENG DUCT PRESS AT THROTTLE UP, RT DUCT PRESS NORMAL. LT BLEED & LT PACK EICAS MESSAGES. REPLACED BOTH HIGH STAGE PILOT & PRSOV REGULATOR IAW MM 36-11-08, MM 36-11-19 ON LT ENG. RAN ENG BOTH DUCT PRESS NORMAL NO BLEED OFF LIGHT ILLUMINATED. NO EICAS MESSAGE NOTED.