What was found
IMMEDIATELY AFTER GEAR EXTENSION & 3 GREEN GEAR DOWN & LOCK LIGHTS, RECEIVED AMBER HYD VOLUME LOW CAS MSG. EMER BRAKING WAS USED & RT OTBD TIRE APPEARS TO HAVE LOCKED UP & BLOWN. REMOVED FAULTY NLG ACTUATOR EXTENSION HOSE AND INSTALLED NEW EXTENSION HOSE IAW CE-680 MM CH 32-30-30. REMOVE OLDER MODEL NLG ACTUATOR RETRACTION HOSE AND INSTALL NEW UPDATED RETRACTION HOSE IAW CE-680 MM CH 32-30-30. SERVICED AIRCRAFT HYD SYSTEM IAW CE-680 MM CH 12-12-02. LANDING GEAR FUNCTIONAL/LEAK CHECKS GOOD IAW CE-680 MM LANDING GEAR OPERATIONAL CHECK CH 32-00-00.