What was found
DURING APPROACH, SLAT DISAGREEMENT LIGHT ILLUMINATED WITH NO BLUE SLAT EXTEND LIGHT. AIRCRAFT APPEARED TO ROLL SLIGHTLY TO THE LEFT. CREW EXECUTED GO-AROUND PROCEDURES, AN UNEVENTFUL LANDING WAS ACCOMPLISHED WITH FLAPS AT 40 DEGREES AND NO SLATS. MAINTENANCE REPLACED RIGHT WING SLAT T-DUCT AND INSTALLED MISSING BUSHINGS ON OUTBOARD SIDE OF FRONT SPAR WING SUPPORTS, OPERATIONAL CHECK NORMAL.