What was found
THREE TRIES TO GET GEAR RETRACTED OUT OF DENVER. INSPECTED LANDING GEAR. FOUND PITCH DAMPERS NITROGEN CHARGE LOW ALL 4. SERVICED PITCH DAMPERS IAW A300 MM 12-12-32. RECHECKED PRESS AFTER 48 HRS. NO DEFECTS NOTED. LUBED LANDING GEAR IAW A300 MM 12-22-32. REMOVED AND REPLACED LANDING GEAR NORMAL CONTROL MICROSWITCH UNIT AND PERFORMED TEST IAW A300 MM 32-31-11. SYS OPS CHECKED GOOD. NO DEFECTS NOTED. CLEANED PROXIMITY SWITCHES IAW A300 MM 32-00.