As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING THE TAKE OFF, BEFORE COMPLETE RETRACTION OF THE FLAPS, EICAS MESSAGE DISPLAYED "L HYD PRESSURE" FOLLOWED BY FURTHER MESSAGES INDICATING A LEFT HYDRAULIC SYS PRESS. UPON EVALUATION OF SYSTEM FAULT WAS ISOLATED TO A SEPERATION OF AUTOBRAKE ACTUATOR FROM BRAKE METERING VALVE ASSY. IAW AMM 32-41-03/401 BRAKE METERING VALVE ASSY WAS REMOVED AND REPLACED. OPS CHECKED SATISFACTORY.