As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STATUS PAGE SHOWS HYD PRESS DEM 4, CMC SHOWED FCU L HYDIM 4 INTERFACE FAIL MESSAGE 29507. RERACKED HYDIM 4 CARD & FCU L, CYC LED FLAPS TO 30 DEG WITH NORMAL DEMAND 4 PUMP OPERATION WITH SW IN ON & AUTO POSITIONS. EICAS MESSAGE EXTINGUISHED, NR 4 HYD DEM SYS SERVICEABLE.