As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TIRE PRESS INDICATION ON EICAS, GEAR SYNOPTIC PAGE INDICATED TIRE #6 173PSI. TIRE PRESSURE CONTINUED TO DECAY AT AN APPROXIMATE RATE OF 6PSI/HR. RAN NNC AND DECLARED AN EMERGENCY WITH KIX APPROACH. TAXI TO GATE WAS UNEVENTFUL. ***EMERGENCY DECLARED*** REMOVED AND REPLACED #6 MLG TIRE AND WHEEL ASSY IAW MM 32-45-01-5. SERVICED #6 TIRE AND CHECK PRESSURE IAW MM 12-15-03-3. A/C OK FOR SVC.