What was found
PROPELLER BLADE FRACTURED FULL CHORD AND SEPARATED IN-FLIGHT. FRACTURE OCCURRED APPROXIMATELY 11.5 INCHES FROM BLADE TIP. VISUAL INSPECTION REVEALED BLADE LEADING EDGE CHIPPED AT FORWARD MOST POINT OF FRACTURE LINE. BLADE CHIPPED ON BLADE BACKFACE JUST AFT OF LEADING EDGE APEX. NOT VISIBLE FROM BLADE FACE. SOURCE OF CHIP UNKNOWN. TIME DEFECT EXISTED PRIOR TO FAILURE UNKNOWN. SUBMITTER SUGGESTS INCREASED ATTENTION AT PRE-FLIGHT RECOMMENDED.