What was found
DURING FINAL APPROACH WHILE SELECTING GEAR DOWN FLAPS 20, GOT TE FLAP DISAGREE EICAS AND TRAILING EDGE LIGHT. RAN QRH, WAS DIRECTED TO TRAILING EDGE FLAP ASYMMETRY QRH. LANDED PER QRH PROCEDURES. PERFORMED FSEU BITE PROCEDURE ON ALL 3 FSEU'S REF FIM 27-51 FT 804 FIG. 104A AND FT 805 FIG. 104B. #1 FSEU SHOWED CURRENT FAULT OF FLAP DISAGREE, #2 FSEU SHOWED CURRENT FAULT OF FLAP ARM DISAGREE AND #3 FSEU HAD NO CURRENT FAULTS. FLAP LEVER WAS IN FLAP DETENT POS. 20 AND ALT FLAP SELECTOR SWITCH WAS IN 20. OPERATED FLAPS REF AMM 27-51-00-2. FLAPS OPERATED NORMALLY WITH NO TE FLAP DISAGREE EICAS MESSAGE. PERFORMED BITE PROCEDURE OF ALL 3 FSEU'S AGAIN REF FIM 27-51 FT 804 FIG. 104A AND FT 805 FIG. 104B AND NO CURRENT FAULTS NOTED. A/C OK FOR SERVICE. UPDATE FROM THE FLIGHT CREW CAPTAIN BRIAN BERNETT EMP# 837116. WANTING TO VERIFY WITH MAINTENANCE THAT FLAP HANDLE AND THE ALTERNATE FLAP SELECTOR SWITCH BOTH WERE IN THE 20 DEGREE POSITION.