As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE HP VALVE FAIL LEFT EICAS MESSAGE DISPLAYED WHEN TROTTLE WAS ADVANCED TO THE TAKEOFF DETENT. THE TAKEOFF WAS ABORTED AND VALVE RESET WAS ATTEMPTED AS PER THE CHECKLIST. THE SAME EICAS MESSAGE DISPLAYED ON THE SECOND ABORTED TAKEOFF. REMOVED AND REPLACED LT HP VALVE P/N C144873-2, S/N 1698 WITH OVERHAULED UNIT P/N C144873-2, S/N 1091, REMOVED AND REPLACED LT HP PRESSURE P/N 1153P0104, S/N 0077 WITH NEW SWITCH P/N 1153P0104, S/N 0060 ALL WORK PERFORMED IAW 680 MM 36-10-00. OPS CHECK GOOD.