What was found
R1 DOOR MISSING MULITPLE PLACARDS. REMOVED FROM SERVICE. FOUND 4 MISSING PLACARDS ON R1 UPPER DOOR LINER. INSTALLED REQUIRED PLACARDS IAW AMM 20-10-09-400-801-A REF AIPC 11-32-03 FOR PLACEMENT AND CORRECT PLACARDS. ACFT OK FOR SERVICE. MISSING PLACARDS WERE N,F,D,C. SLIDE DISARM AND SLIDE INDICATION, DOOR OPENING INSTRUCTIONS, AND "OPEN" PLACARD.