What was found
RECEIVED FLAPS FAIL CAUTION MSGS ON FINAL APPROACH. FAILED AT 41 DEGREES. REPLACED FLAP ACTUATORS R1, R2, R3, R4, L1, L2, L3, AND L4. OPERATIONAL CHECK GOOD AMM 27-53-01, AMM 27-53-05. P/N 852D100-19, S/N OFF 4982, 5039, 4609, 4941, P/N 853D100-20, S/N OFF 2903, P/N 854D100-20, S/N OFF 2721, P/N 853D100-19, S/N OFF 2898, P/N 854D100-19, S/N OFF 2360.