What was found
ON APPROACH GEAR NOT DOWN EICAS & NO NLG GREEN LIGHT NOT ILLUMINATED, FOLLOWED BY GEAR DISAGREE CHKLIST. 2 LOW PASSES FROM TOWER INDICATED NLG GEAR APPEARED TO BE DOWN. EICAS CONFIG & DISAGREE CHKLISTS PERFORMED & GEAR COMPLETION OF 14:16 LANDING SUCCESSFUL & TAXI TO GATE. WAS ADVISED NLG PIN WOULD NOT SECURE IN NLG. CREW DECLARED EMERGENCY LANDING. ACFT LANDED WITHOUT INCIDENT. ACFT GROUNDED FOR INSP & MX. R & R DAMAGED NLG AFT LOCK LINK & LEAKING LOCK ACTUATOR IAW AMM 32-21-09 & AMM 32-34-02. REMOVED, REPLACED & ADJUSTED NLG LOCK PROXIMITY SWITCH SENSORS S255 & S233 IAW AMM 32-61-03. GREASED ALL FITTINGS ON NLG IAW AMM 12-21-12. OPS AND LEAK CHKD GOOD IAW AMM 32-34-00. NO FURHTER MAINTENANCE ACTION REQUIRED.