What was found
FLT JB1422 - LGB-PDX CREW DECLARED EMERGENCY INBOUND TO PDX WITH A SLAT FAIL EICAS MESSAGE ON APPROACH. CREW ACCOMPLISHED QRH PROCEDURES WITH SLATS FAILED AT ZERO, AIRCRAFT LANDED WITHOUT INCIDENT. MX ACCOMPLISHED FIM 27-81-00-810-802A FOUND LT WING NR 7 SLAT ACTUATOR TRIPPED. REMOVED AND REPLACED NR 7 SLAT ACTUATOR IAW AMM 27-81-01, ALSO FOUND SLAT TRACKS NR 4, 6, 7 AND 8 OUT OF RIG. ACCOMPLISHED MECHANICAL RIG IAW AMM 27-80-00-820-801A/200 ALSO ELECTRICAL RIG IAW AMM 27-80-00-820-802-A/200. ALL CHECK GOOD, AIRCRAFT RETURNED TO SERVICE.