Enginering support is required when customer needs a professional engineering assessment, preparation of the technical documents that based on analysing of technical other documents (AD,SB,ASB,SIL,MOL, etc.), development of the technical documents (EO,AF,MEL,AMP,JC/TC/WC, CMP card, etc.) based on manufacturer instruction and requirement for governor authorities, creating of the new tasks in the maintenance tracking systems such as (CAMP,CMP, RAMKO, etc.) when task is not presented, preparation of the documents for obtaining ‘Permit to Fly’, NTO, creating of the operation manuals. Our company has a group of aviation engineers who obtained their engineering degree in aviation university and hold the title «PhD of Technical Operation of Air Transport».