JAR is the standard for aerospace systems in which the security international regulations and laws are indicated. A section of this standard is related to the crash test of the helicopter, occupant safety and helicopter structure strength. The high cost of the experimental tests increases the demand to the investigations and computer simulations in this field. In this project a proper model developed to investigate the emergency landing situation in accordance with the JAR standard. Crash testing is performed on SHAHED278 civil helicopter finite element model. The FE model has been produced with FEMB and Ls-PREPOST preprocessors, solved with explicit FE LS-DYNA code and post processed in the final stage. Deformations, structure fracture, sequence of events and dynamic response of different parts of the structure have been predicted and compared with the real model. Occupant safety is the most important parameter specified in JAR standard. After model validation, the accelerations at the pilot seat position were calculated. These accelerations were then inserted to a dummy model in order to predict the occupant displacement and pilot risk of injury. Finally the requirements predicted by the JAR standard on this validated model have been investigated.
