What was found
SLATS FAIL CAUTION MESSAGE. THE SLAT ACTUATOR HAD TRIP INDICATORS. FOUND THE LT NR 6 AND RT NR 5 TRIPPED. RESET THE LT NR 6 IAW ETN-CR-27-084R8 BUT THE RT NR 5 INDICATOR WILL NOT RESET. AFTER FURTHER INSPECTION OF SLAT ACTUATOR TRIP INDICATORS FOUND THE LT NR 1 AND LT NR 3 TRIPPED. RESET THE NR 1 AND 3 IAW ETN-CR-27-084 AND ALL TRIP INDICATORS REMAINED RESET AFTER MULTIPLE OPS CHECKS OF THE SLATS SYSTEM. OPS CHECKED GOOD. AIRCRAFT CAN RETURN TO SERVICE.