As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APPROX 60 MIN INTO FLT THE R ENG HPSOV EICAS MSG CAME ON FOR APPROX 3 MINS THEN EXTINGUISHED BY ITSELF. DURING THIS TIME THE L ENG INTR WERE AS FOLLOWS N1 AT YEL/EGT 800/N2 103/FF8.0/VIB 1.5. L ENG THROTTLE UNRESPONSIVE. R ENG NORMAL. UPON CONSULT W/ ATL MX AND QRH L ENG EEC PLACED IN ATLN MODE WITH NO EFFECT. L ENG SHUTDOWN AT 20000. UNEVENTFUL LANDING AT JFK. JFK MTC REPLACED L ENG HMU AND EEC, ENG RUN NORMAL.