What was found
'SLAT FAIL' CAUTION MSG ON APPROACH, SLATS DID NOT DEPLOY FLAPS DEPLOYED AS PER FLAP SCHEDULE TO 45'. REPLACED RT SLAT ACTUATORS 3-3, 2-3 AND 3-1 FOR BEING TRIPPED. IAW AMM 27-81-09 OPS TEST GOOD. PERFORMED MECHANICAL RIGGING OF LT AND RT SLATS IAW AMM 27-81-00-820-801 OPS TEST GOOD. C/W FINAL TORQUE AND SAFTIED ALL RT WING SLAT TORQUE TUBE BOLTS IAW AMM 27-81-00 ACTUATOR SLAT NR 2 P/N 768616C S/N 0402. ACTUATOR SLAT NO 3 (RII) P/N 766385C S/N B3285 RT IB.