What was found
MIA - TRAILING EDGE FLAP DISAGREE LIGHT ON FINAL WHEN SELECTING 25 DEGREE FLAPS. FLAP INDICATOR STUCK AT 20 DEGREE FLAPS. ACCOMPLISHED QUICK REFERENCE HANDBOOK CHECKLIST. EMERGENCY DECLARED ACCOMPLISHED GO AROUND LANDED MIA WITH 20 DEGREE FLAPS WITHOUT INCIDENT. ACCOMPLISHED BITE OF FLAP SLAT ELECTRONIC UNIT NO FAULTS FOUND. REPLACED FLAP SLAT ELECTRONIC UNIT AS PRECAUTIONARY. SYSTEM GROUND CHECKED NORMAL OPERATION.