What was found
THE MAIN CABIN DOOR IS VERY DIFFICULT TO CLOSE FROM THE INSIDE. PERFORMED AN EXTERNAL GVI OF THE MAIN CABIN DOOR AND COMPLETED AN OPS CHK PRIOR TO OPENING, NO DISCREPANCIES. AFTER CONNECTING ACFT BATTERIES, MAIN CABIN DOOR WAS OPENED & A FOLLOW- UP INTERNAL GVI WAS CONDUCTED. DURING THIS INSP, DOOR LOCK PIN HOLES WERE FOUND TO BE CONTAMINATED WITH DIRT & DEBRIS. AREAS CLEANED & LUBRICATED . MAIN CABIN DOOR WAS THEN ACTUATED FROM INSIDE, LOCKING MECH EXHIBITED NOTICEABLY SMOOTHER MOVEMENT. DOOR LOCK INDICATION SENSOR OBSERVED TO EXTINGUISH AT THE CORRECT POINT