What was found
WHILE IN FLIGHT GREEN HYDRAULIC SYSTEM PUMP OVERHEAT INDICATION NOTED. TURNED PTU OFF PERFORMED GREEN PUMP OFF PROCEDURE TURNING GREEN PUMP ON DURING FINAL APPROACH. NORMAL GEAR EXTENDED AND NOSE STEERING WITH NO SUBSEQUENT OVERHEAT INDICATIONS FOR 20 MIN OPERATIONS. EMERGENCY WAS DECLARED AND FLIGHT LANDED WITHOUT INCIDENT. THE AIRCRAFT WAS GROUNDED. FOUND THE TEMPERATURE SWITCH 1381G FAULTY. REPLACED THE TEMPERATURE SWITCH IAW AMM 29-33-11.