What was found
TAILSKID LIGHT REMAINED ON AFTER GEAR RETRACTION. CREW REPORTED THAT AFTER CYCLING GEAR THE SYSTEM WORKED NORMALLY AND ON APPROACH, SYSTEM FUNCTIONED NORMAL. INSPECTED SWITCH AT TAILSKID. NO DEFECTS FOUND. SUSPECT ICE IN BILLINGS CAUSED SWITCH TO STICK. LUBRICATED SWITCH, NO HISTORY FOR 90 DAYS, ACFT RELEASED FOR SERVICE.