What was found
FLT 04 - PHX - LAS - FX - CREW REPORTED AFTER TAKEOFF RECEIVED AN ACARS MESSAGE THAT THE SLATS WERE LOCKED IN THE UP POSITION. CREW CONTINUED ON TO LAS. CREW DECLARED AN EMERGENCY ON APPROACH INTO LAS. EMERGENCY EQUIPMENT WAS CALLED OUT. THE CABIN WAS NOT PREPPED. CREW MADE A ZERO SLAT FLAPS 3 LANDING. THE LANDING WAS UNEVENTFUL. THE ACFT TAXIED TO THE GATE. MX REPLACED THE SLAT AND FLAP CONTROL COMPUTER IN THE NR 1 AND NR 2 POSITIONS. MX PERFORMED A BITE TEST PER AMM 27-81-00-740-002. OPERATIONAL CHECK WAS GOOD. (S)