What was found
SELECTED GEAR DOWN AT APPROX 300 KIAS, RECEIVED MLG DISAGREE CAS. HAD TOWER LOOK, CONFIRMED MLG DOWN, NLG UP & NLG DOORS CLOSED. RAN QRH & WAS ABLE TO GET NLG DOWN. IAW MM 31-31-00 & 45-45-00. FIM NLG DOWNLOCK SNSR/LEVER DISAG 32-61-00-810-812-A. JACKED ACFT. PERFORMED 5 SUCESSFULL MLG CYCLES. NO DEFECTS NOTED. IAW MM 32-31-00-720-801-A/500 VERFIED RIGGING OF FREEFALL SYS. IAW MM 32-35-00-820-801-A/500. FOLLOWING FIM, SHOWED FAILURE OF NLG UPLOCK BOX. REMOVED & INSTALLED A NEW NLG UPLOCK BOX. OPS & LEAK CHECKED GOOD. IAW MM 32-31-05-400-801-A. RIGGED FREEFALL SYS AFTER REPLACEMENT OF NLG UPLOCK BOX. IAW MM 32-35-00-820-801-A/500. PERFORMED FULL SYS HYD BLEEDING.