As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF LANDING GEAR WOULD NOT RETRACT. GEAR HANDLE WOULD NOT MOVE. ALL GEAR LIGHTS SHOWED GREEN, GEAR, DOWN AND LOCKED. NO RED LIGHTS. FOUND NLG SQUAT SWITCH INTERMITTENT AND UPPER STRUT NITROGEN CHAMBER LEAKING NITROGEN. REMOVED AND REPLACED THE NOSE SQUAT SWITCH IAW MM 32-60-00. OPS CHECKED GOOD. REPACKED THE NLG OLEO STRUT IAW MM 32-29-00 AND MM 12-10-38. OPS AND LEAK CHECKED GOOD.