What was found
AFT HYDRAULIC ACTUATOR BOLT WAS FOUND TO BE SHEARED IN HALF AND DISPLACED FROM ITS DESIGNED LOCATION. THE FAILURE OCCURRED DURING SKI ACTUATION WHILE AIRBORNE, FOLLOWING USE ON HARD/BREAKABLE CRUST SNOW SURFACES DURING PREVIOUS FLIGHTS. FURTHER INSPECTION OF THE BOLT REVEALED SIGNS OF A STRESS CRACK AND DISTORTION PRIOR TO SHEARING. RECOMMENDED REGULAR REMOVAL AND INSPECTION OF BOLT FOR FATIGUE AT REGULAR INTERVALS (100 HOUR/ANNUAL) OR MORE FREQUIENLY UNDER EXTREME USE CONDITIONS.