As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE LANDING GEAR HANDLE WOULD NOT RAISE AFTER TAKEOFF. THE GEAR HANDLE RELEASE BUTTON WAS USED TO RAISE GEAR. WHEN THE GEAR WAS LOWERED ON APPROACH, A LOUD THUMP WAS HEARD FROM NOSE AREA. THE AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE FOUND THE NLG STRUT HAD LOW PRESSURE. THE STRUT WAS SERVICED WITH NITROGEN AND OPERATION CHECKED GOOD.