What was found
FLT JB922 ORD-BOS ON APPROACH INTO BOS HAD A "SLAT FAIL" EICAS MESSAGE WHILE SELECTING SLAP/FLAP 1 WITH ASSOCIATED SHAKER ANTICIPATED AND SPOILER FAULT. CREW PERFORMED QRH PROCEDURES AND LANDED UNEVENTFUL. MX PERFORMED FIM 27-81-00-810-802-A FOUND SLAT ACTUATOR NR 4 ON RIGHT WING TORQUE LIMITER INDICATOR TRIPPED. REMOVED AND REPLACED ACTUATOR IAW AMM 27-81-01, ALL OPS AND RIGGING CHECK GOOD. SHAKER ANTICIPATED AND SPOILER FAULT DUE TO SLAT DISAGREE IAW FIM 27-81-00, AIRCRAFT RETURNED TO SERVICE.