19990911026809A

(.19) On September 11, 1999, at 1800 central daylight time, a Hiller UH-12A helicopter, N212W, collided with the ground while on approach to land, in Satartia, Mississippi. The helicopter was operated by the commercial pilot under the provisions of title 14 CFR part 91, and visual flight rules. Visual meteorological conditions prevailed and no flight plan was filed for the local flight. The pilot was not injured, however, the unauthorized passenger received minor injuries and the helicopter sustained substantial damage. The flight had originated about 1745. According to the pilot, he decided to land in an open area next to a soy bean field to relieve himself. He stated that during the approach to the selected landing site, he heard a loud "bang" behind him followed by the control stick moving forcefully in all directions. He stated that he had lost complete control of the helicopter resulting in a hard impact with the ground followed by the helicopter rolling onto its right side, substantially damaging the helicopter. (-23)during landing approach pilot stated he lost all cyclic control including anti torque loss. A/c landed on skids with side movement and rolled over on right side. Pilot escaped with no injuries. A passenger however sustained minor injuries. (.4)the pilot decided to land in an open area next to a soybean field due to a physical urgency. He stated that during the approach, a 'loud noise occurred' and the helicopter became 'uncontrollable,' with the control stick moving forcefully in all directions. Upon impact, the helicopter rolled onto its right side, sustaining damage to the main rotor blades, the tail boom, the skids, and the fuselage. Examination of the helicopter disclosed that the forward engine/transmission mounts had separated from the airframe. Examination of the engine mounts, however, revealed the fracture surface was consistent with overstress separation.