The paper uses an example of the designed polymer composite material (PCM) for all-composite helicopter airframe unit to consider an approach and a set of measures taken to develop a method for quantitative assessment of the integrity level. Relevance of solving this problem could be justified by the following objective circumstances: general trend in transition from the multi-part to the all-composite integral structures in order to reduce the unit mass and insufficient study of the integrality process and development of both the methodological and computation base in quantitative assessment of the integrity level. Analysis of the scientific papers shows that currently clear methods for quantitative assessment of the integrity level are missing, and the developers, when designing the PCM all-composite units, assess the integrity level based mainly on their own experience. In accordance with the developed work plan, the Mi-171A3 helicopter cockpit canopy frame is selected as the study object. Development of the ideas on application of the polymer composite materials and integral-type structures in the aviation engineering is based on the works of scientists and specialists from MAI, FSUE VIAM, KNITU – KAI, and also taking into account limitations laid down in technical specifications for design of the selected object. Goals and objectives are formulated, they consist in selecting an approach for quantitative assessment of the level of integrity, developing a computation base and determining the level of integrity of the all-composite frame of the MI-171A3 helicopter cockpit canopy made of the polymer composite materials.

EDN ULJGRX