What was found
GEAR DISAGREE N AMBER CAS ILLUMINATED - AFTER TAKEOFF AND GEAR RETRACTION, NLG POSITION DISAGREE WITH A AMBER HASHED GEAR INDICATOR . FOLLOWED CHECKLIST, BLEW GEAR DOWN PER CHECKLIST, GOT THREE GREN INDICATIONS. LANDED UNEVENTFULLY. //SIGNOFF//VERIFIED DISCREPANCY. JACKED AIRCRAFT. REMOVED NOSE LANDING GEAR POSITION SWITCH P/ N: S3177-1 S/ N: NA AND INSTALLED NEW NOSE LANDING GEAR POSITIONSWITCH P/ N: S3177-1 S/ N: NA. CYCLED LANDING GEAR SEVERA L TIMES TO BLEED AIR OUT THE HYDRAULIC SYSTEM. CYCLED MAIN LANDING GEAR SEVERAL MORE TIMES WITH NO DISCREPANCIES. OPS CHECKED GOOD. ALL WORK DONE IAW CESSNA 680A AMM 32-60-00.