What was found
DURING PREFLIGHT, FLIGHT CREW WAS UNABLE TO OPEN THE L1 DOOR. PERFORMED INSPECTION AND CHECK OF THE L1 DOOR IAW AMM 52-11-00-6, STEPS 1 & 2. A NEW ESCAPE SLIDE WAS INSTALLED IAW WRI 52-10/8424. DOOR OPENS AND CLOSES NOW WITH NORMAL EFFORT.