As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RECEIVED A LT HYD SYS PRESSURE EICAS MESSAGE, ALONG WITH RUDDER RATIO EICAS MESSAGE ON EXTENDING FLAPS TO 1. LEFT HYDRAULIC QTY 1.0, LEFT HYDRAULIC PRESSURE 3100 PSI. R & R THE LT HYD SYS PRESSURE SWITCH IAW AMM 29-11-17-4. LEFT HYD PRESSURE SWITCH OPS AND LEAK CHECKED NORMAL IAW AMM 29-11-00-5. OK FOR SERVICE.