What was found
AFTER EXTENDING MLG, RECEIVED A RED CAS WARNING LG LEVER DISAG. 2 MLG SHOWED DOWN & LOCKED, NLG SHOWED UP. RAN QRH, CYCLED MLG. MOVED MLG LEVER TO UP POSITION, NLG SHOWED UP & LOCKED, DID NOT FEEL NLG IN TRANSIT. BOTH MAINS RETRACTED NORMAL. MOVED GEAR LEVER DOWN, ALL INDICATIONS NORMAL, RECEIVED 3 GREENS & HAD AN UNEVENTFUL LANDING. JACKED ACFT PERFORMED 2 GEAR SWINGS WITH NO DEFECTS, CHECKED OEM DIAGNOSTICS, FOUND NLG UPLOCK FAULT HISTORY FROM PREVIOUS FLT, INSPECTED PROX SWITCH, FOUND CONNECTION TO SE SECURE & SWITCH IUGGING IN TOLERANCE, PERFORMED FIM TASK, NO DEFECTS. REMOVED NLG PROX SWITCH & INSTALLED NEW. PERFORMED SWITCH RIGGING CHECK , PERFORMED 3 GEAR SWINGS, NO DEFECTS IAW AMM 32-61-01