What was found
NOSE GEAR BUMPS, IN CRUISE FLIGHT, AFTER APROX 1 HOUR INTO THE FLIGHT. WE FELT AND HEARD 3 "BUMPS". PERFORMED MLG BUMP TROUBLESHOOTING CHECKLIST. ONLY FINDING WAS NLG STRUT. NO PRESSURE - WAS 80 PSI LOW. SERVICED NOSE STRUT WITH N2 AS REQUIRED. ALL OTHER CHECKS GOOD. WORK PERFORMED IAW MM 32-30-00. REF FAS WO 10-1355.