What was found
ON CLIMB OUT RELAY CLICKING BEHIND CAPTAIN SEAT. CYCLED ALL 3 PUMPS, FUEL, CLICKING REMAINED, RETURNED TO LAND. REPLACED LG ELECTRONICS UNIT IAW AMM 32-32-01. OVERWEIGHT LANDING, LANDING PERFORMED SINK RATE LAST 500 FEET AT 100 FEET PER MINUTE. OVERWEIGHT LANDING INSPECTION NOT REQUIRED DUE TO SINK RATE IAW MNTC WC 05-200-01 & AMM 05-50-25.