As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
5HRS INTO FLIGHT AT FL370 .82M GOT TIRE PRESS EICAS ALERT. GEAR SYNOPTIC SHOWS #9 TIRE AT 181 PSI AND AMBER. TIRE PRESS ON STATUS PAGE ALSO. REMOVED AND REPLACED #9 MAIN WHEEL ASSY REF MM 32-45-01-4. AIR PRESSURE WAS WITHIN NORMAL LIMITS WITH BRAKE TEMP AT .5, NO MX MESSAGES OR FAULTS. A/C OK TO CONTINUE.