What was found
ON CLIMB OUT OF ICN TIRE PRESS EICAS. RAN CHECKLIST AND GEAR SYNOPSIS SHOWED RIGHT NOSE GEAR TIRE PRESSURE AT 54 PSI. IT EVENTUALLY WENT TO 0. LANDED AT CAN AND MX TOWED AC TO THE GATE. EMERGENCY DECLARED. CHECK FOUND THE RIGHT NOSE PUNCTURED.REMOVED AND REPLACED LEFT AND RIGHT NOSE TIRE PER AMM 32-45-05-4 AND TIRE PRESSURE SERVICED PER AMM 12-15-03-3, NO LEAKAGE FOUND.A/C OK TO CONTINUE. PERFORMED NOSE LANDING GEAR GVI PER AMM32-21-00-6. NORMAL.A/C OK FOR SERVICE.