What was found
WHEN SELECTING FLAPS 8 FLAPS FAIL CAUTION MESSAGE. REPLACED RIGHT INBOARD FLAP ACTUATOR; RIGHT INBOARD FLAP OUTBOARD ACTUATOR; LEFT WING INBOARD FLAP INBOARD ACTUATOR; LEFT WING INBOARD FLAP OUTBOARD ACTUATOR IAW SB 601R27-120 AND MM 27-53-01, 27-53-05. OPERATIONAL CHECK GOOD. P/N OFF 852D100-11, S/N OFF 1450AB, P/N OFF 852D100-9, S/N OFF 181, P/N OFF 852D100-11, S/N OFF 232AB, P/N OFF 852D100-9, S/N OFF 162.