What was found
ENROUTE, FLIGHT CREW OBSERVED A "T/E FLAP DISAGREE" MESSAGE WITH FLAP HANDLE AT 20. DECLARED AN EMERGENCY AND EXECUTED A MISSED APPROACH IN ORDER TO PERFORM THE ALTERNATE FLAPS PROCEDURE. ON SELECTING ALTERNATE FLAPS, "T/E FLAP DISAGREE" MESSAGE DISAPPEARED. FLAPS WERE EXTENDED TO 30 USING ALTERNATE FLAP EXTENSION PROCECDURE. LANDED WITHOUT FURTHER INCIDENT. FOUND NR 1 FLAP TRANSMISSION OVERLOAD INDICATOR TRIPPED. RESET OVERLOAD INDICATOR AND COMPLIED WITH NORMAL FLAP SYS OPS CHECK. NO DEFECTS NOTED. NR ONE FLAP TRANSMISSION OVERLOAD INDICATOR WAS INSPECTED AGAIN SEVERAL DAYS LATER WITH NO FAULTS FOUND.