What was found
SHIP 6706 FLIGHT ATTENDANTS REPORT SAME ISSUE WITH 3L DOOR HANDLE POPS UUP FROM CLOSED POSITION ONCE AIRCRAFT PRESSURIZES. "KNUCKLE KNOCKER" ON 3L DOOR ALSO WILL NOT DEPOY / STOW AS DOOR IS ARMED / DISARMED. CORRECTIVE ACTION: FOUND PLACARD ON DOOR KNOCKER TURN AND INPEDING KNOCKER FROM FUNCTIONING. R/R PLACARD. RETRACTBLE DOOR OPS AS SHOULD PER B757 AMM 52-11. ADJUSTED DOOR STOP PINS PER B757 AMM 52-11. OPS CHK RGD ADJUSTED L-4 DOOR PER B757 AMM 52-11. OPS CK GOOD.