What was found
ON APPROACH, AT 7000 FT, 210KTS, SELECTED FLAPS 1 TO FLAPS 5. RECEIVED TE FLAP ASYMMETRY EICAS MESSAGE AND TRAILING EDGE LIGHT. COMPLETED THE QRH TRAILING EDGE FLAP ASYMMETRY CHECK LIST AND USED ALTERNATE FLAPS, SETTING 20 DEGREES FOR LANDING. EMERGENCY DECLARED. CREW STATED THAT THE TE FLAP DISAGREE NOT ASYMMETRY. NOTED BY MAINTENANCE. 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 HYD 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, CHECKED 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 IAW MM 27-51-00-2, AND 27-58-01. OK TO CONTINUE.