As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED THE LEFT ELEC HYD PUMP LOW PRESSURE LIGHT IS FLICKERING ON-OFF. ALSO EICAS MESSAGE LEFT ELECT HYD PUMP IN-OP IN VIEW BUT IS INTERMITTANT WITH ALL PUMPS OFF TOO. PERFORMED WIRING CHECKS IAW LM8436. REPLACED LT HYD SYS PRESSURE SWITCH S27 AND RAN ENGINES WITH NO FAULTS.