What was found
FLT 337, IAD-MCO, "SLAT FAIL" EICAS MESSAGE ON SLAT EXTENSION, 220 KIAS AT 6000FT (SPD BRK EXT) LANDED FLAPS "2" SLAT "0" PER QRH. APP SPEED 166 KIAS BRAKE TEMP PEAKED AT 315 DEG. FAULT DETERMINED TO BE TRANSITORY CONDITION PER E190 FIM 27-81-00-810-802-A. A/C OK FOR SERVICE AT THIS TIME. AS PRECAUTION CHECKED ALL SLAT ACTUATORS FOR TORQUE LIMIT TRIP, NONE PRESENT AT THIS TIME PER AMM 27-81-01.