What was found
TRAILING EDGE FLAP DISAGREE DURING FLAP RETRACTION FROM 1 TO UP ON TAKEOFF. RAN CHECKLIST, FLAPS RETRACTED & LIGHTS WENT OUT. CONTINUED TO DAY & LANDED AT FLAPS 20 USING ALTERNATE EXTENSION. DECLARED AN EMERGENCY. C/W HIGH ENERGY STOP/HEAT DAMAGE CONDITION AS PRECAUTION, NO DEFECTS FOUND. WITHIN COOLING PERIOD. OK TO CONTINUE. CREW HAD QUESTIONABLE FULL UP FLAP HANDLE POSITION & CYCLING HANDLE NEAR FULL UP POSITION & NOT IN DETENT GREATER THAN 25 SECS CAUSES A FLAP POSITON DISAGREE EICAS MESSAGE & LOCKS OUT FLAPS. #1 PSEU SHOWS SAME FAULT. CLEANED FLAP LEVER QUANDRANT DETENT PLATE CYCLED FLAPS & FUNCTIONS NORMALLY. MESSAGE DIDN`T RETURN. NO PAST HISTORY. A/C OK TO CONTINUE.