What was found
LE SLAT DISAGREE EICAS DISPLAYED AFTER TAKEOFF. OUT OF PHX ACCOMPLISHED QRH, AND CLEARED MSG, CONTIUNED TO LAX AND LANDED WITH FLAPS 20. AND DECLARED EMERGENCY BECAUSE OF FLAP CONFIGURATION NOT NORMAL.PER QRH, LANDED WITH NO OTHER COMPLICATIONS AND TAXIED TO GATE ,MTX GROUNDD A/C AND PERFORMED FSEU BITE TEST IAW FIM 27-51 FAULT TREE 809, FOUND M483 INBD SLAT POSITION 1 OUT OF RIG ACCORDING TO TABLE 405/27-81-11-993-810. ADJUSTED POSITION RET AND LDG OF SLAT PDU BVDT (M483), RIG WITHIN LIMITS REF 27-81-11 A/C RETURNED TO SERVICE.