摘要: The Army Research Laboratory -Weapons and Materials Research Directorate (ARL-WMRD) performed a failure analysis of a Shock Strut Mount from an Army attack helicopter, which is a component of the main landing gear assembly. The Ri... 展开 The Army Research Laboratory -Weapons and Materials Research Directorate (ARL-WMRD) performed a failure analysis of a Shock Strut Mount from an Army attack helicopter, which is a component of the main landing gear assembly. The Right Hand (R/H) mount, which secures the R/H landing gear trailing arm to the fuselage failed in flight. It was the first of these mounts to fail during flight. Stress corrosion cracking, which initiates at the transition point between the base of the underside of the shaft and the mount base, has been attributed to numerous failures of this item in the past. This has been the result of cadmium wearing off and corroding away in service. The part under investigation failed after 1148 flight hours, and the gross weight of the aircraft at the time of failure was 12,040 pounds. 收起