What was found
WHEN FLAPS WERE SELECTED TO 15 DEGREES ON APPROACH, FLAP DISAGREEMENT WAS NOTED FOLLOWED BY LOSS OF BLUE HYDRAULIC SYSTEM. REPLACED RIGHT NACELLE FLAP ACTUATOR IAW EMB 120 MM 27-50-00. OPS AND LEAK CHECK GOOD. SERVICED BLUE HYDRAULIC RESERVOIR AND CHECKED HYDRAULIC PUMPS. ALL CHECKS GOOD. P/N ON 343100-1001, S/N ON 0177, S/N OFF 0210.