What was found
AFTER COMPLETING THE FINAL WALK AROUND AND WALKING UP THE MAIN ENTRY DOOR STAIRS, LOCKING HANDLE POPPED OUT OF THE OPEN POSITION CAUSING THE DOOR TO MOVE DOWNWARD FORCING THE BOTTOM OF THE DOOR INTO FUSELAGE SKIN CAUSING 3 SCUFF MARKS. RETURNED HANDLE TO OPEN POSITION , WHICH MOVED DOOR BACK TO OPEN POSITION , WHEN STEPPING ON STAIRS, HANDLE RELEASES AGAIN. GAINED ACCESS TO MED OPS MECH & PERFORMED A VISUAL INSP OF ALL SURROUNDING AREAS. CONTAMINATION FOUND, ONE OF THE SPRINGS WERE OUT OF ALIGNMENT FOR HATCH HINGE LOCK. SPRING ADJUSTED AND LATCHING MECHANISM CLEANED & LUBED. OPS CHK PERFORMED WITH NO DEFECTS OR BINDING NOTED. DOOR FUNCTIONAL CHKS SATISFACTORY. WORK PERFORMED IAW AMM 52-11-31.