What was found
DURING APPROACH, SELECTED FLAPS 1 TO FLAPS 5. RECEIVED TE FLAP ASYMMETRY EICAS MESSAGE AND TRAILING EDGE LIGHT. COMPLETED THE QRH, T/E FLAP ASYMMETRY CHECK LIST AND USED ALTERNATE FLAPS, SETTING 20 DEGREES FOR LANDING. EMERGENCY DECLARED. CREW STATED TE FLAP DISAGREE NOT ASYMMETRY. PUT ALL SWITCHES BACK TO NORMAL FROM QRH CONFIGURATION. TURNED ON HYD FOR ALL THREE SYSTEMS AND INCLUDING ADP FOR CENTER. BROUGHT THE FLAP/SLAT DOWN EACH POSITION WITH NO ANOMOLIES. FROM 1 TO 5 HAD A MOMENTARY GLITCH BUT DUE TO NOT HAVING THE CENTER ADP ON. WITH ALL HYDRO SYSTEMS ON, BROUGHT DOWN FLAPS EACH POSITION WITH NO ANOMOLIES. FROM 5 TO 1 AND THEN 1 TO 5 AGAIN TO TRY TO DUPLICATE PROBLEM. COULD NOT DUPLICATE PROBLEM ON GROUND. CHECKED FSEU AND FOUND NO FAULTS AND BITE CHECKED NORMAL. FIM 27-51 809. ALSO WITH FLAPS ALL THE WAY DOWN, CHECK ALL MECHANISMS FOR ANYTHING OUT OF THE ORDINARY, NO LEAKS, NO DAMAGE NOTED. EVERYTHING FAIRED WHILE COMING DOWN AND FULLY UP AND RETRACT. FLAP/SLAT OPERATION OPS CHECKED NORMAL. M/M 27-51-00-2 AND 27-58-01. OK TO CONTINUE.