What was found
STARTING DESCENT OUT OF 24000 GEAR LEVER IN UP POSITION GEAR UNLOCK LIGHT ILLUMINATED. LANDING GEAR EXTENDED AS NORMAL BEFORE LANDING AND UNLOCK LIGHT EXTINGUISHED. REPEAT WRITEUP. FOUND LEFT UPLOCK SWITCH HAS HIGH RESISTANCE THROUGH UP CONTACTS REF WDM 32-30-01-02, REINSTALLED CLAMPS AS NEEDED. VERIFIED PROPER NLG STRUT SERVICING FOUND 279 PSI IN THE UPPER AND 41PSI IN THE LOWER, AND FOUND 9.75 IN OF STRUT EXTENSION, IAW CE680 AMM 12-20-32. PERFORMED NOSE LANDING GEAR (NLG) CASTER CHECK PER AMM 32-30-30 NO DEFECTS NOTED. - REMOVED AND REPLACED LEFT MAIN GEAR UPLOCK SWITCH IAW CE680 AMM 32-60-00, COMPLETED RIGGING CHECK AND SAFETIED AS REQUIRED. OPS CHECK GOOD.