What was found
UNSCHEDULED LANDING. LEVEL OFF AT FL300: FLAPS EXTENDED ON THEIR OWN FLUCTUATING BTW 2 DEG AND 20 DEG MONENTARY HYD PUMP 2B CAUTION, THEN FLAPS DEGRADED STATUS MSG. T/S PER FIM 27-50-00 FROM PAGE 107, FLAPS DEGRADED. CHECKED SDU FOR FAULT, NO FAULT FOUND. INTERREGATED FECU AND RECORDED CODE. MOST PROBABLE CAUSES 1-FECU, 2-RIGHT MOTOR BRAKE, 3-WIRING , 1-11-12A, 1-11-2B 1-15-2A, 1-15-2B. VISUAL INSPECTED FLEX SHAFTS FOR TWISTS, NO DEFECTS FOUND. TEST FLAPS SYSTEM COMPONENTS ALL CHECKED GOOD. REMOVED AND REPLACED FECU PER AMM 27-51-05 OPS CHECKED NORMAL. A/C OK FOR SVC.