What was found
RT WING SLIDE EICAS AT 25 00 FT 180KTS. THEN AGAIN ON SHORT FINAL UNTIL TOUCHDOWN. DEACTIVATED THE OFF-WING SYS REF AMM 25-60-00. UPON INSPECTION OF THE SLIDE COMPARTMENT DOOR FOUND THE AFT STUD FOR THE LATCH NOT SECURED. SADDLE WASHERS P/N 416N2721-8. REPLACED BUSHING ON RT OVER WING EXIT ACCESS PANEL, AND REINSTALLED STUD IAW AMM 25-60-00 RETURNED OVER WING SLIDES BACK TO NORMAL CONDITION. INSPECTED REACTIVATION OF RT OVERWING DOOR SLIDE.