What was found
PHX - FLT 26 EN ROUTE OGG TO PHX. FLAPS FAILED TO MOVE, TRAILING EDGE LIGHT ON, AND EICAS MSG TRAILING EDGE DISAGREE DISPLAYED. FLAPS NORMAL ON ALTERNATE SYS. THE FLIGHT PERFORMED A GO-AROUND TO RUN THE CHECKLIST. ON THE SECOND APPROACH, THE FLIGHT LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE REPLACED THE FSEU, AND PERFORMED A VISUAL INSPECTION OF THE FLAP DIVE SYSTEM. REPLACED TRANSISTOR Q38 (MPN H00212-2), DIODE ARRAY MICROCIRCUIT U92 (MPN 057070-001), AND DIODE ARRAY MICROCIRCUIT U94 (MPN 057070-001) ON A4 PCA DUE TO TEST FAILURES. UNIT PASSED FINAL ACCEPTANCE TESTING. RETURNED TO SERVICE.