Specialists of Uzbekistan Airways Technics (UAT) national air company «Uzbekiston Havo Yollari» for the first time performed complex repairs on Boeing 757-200 airliner of "SCAT" airline (Kazakhstan) - a long-term and reliable partner of Tashkent repair company.
Since the beginning of this year, UAT has undergone regular maintenance and repair of two Kazakhstani air carrier's aircraft. One of the aircrafts, along with a heavy form of maintenance - C-chek - for the first time together with specialists of Boeing Corporation implemented a project to repair the tail part of the fuselage. This type of repair is considered to be a complex operation, as poor quality repair of the damaged hull may cause later structural destruction of the aircraft during repeated pressure drop cycles.
As this type of work has not been carried out by UAT specialists before, the project implementation was divided into two stages. In the first stage, which involved thorough preparation, the necessary documentation and technologies were studied and developed, drawings, special equipment and parts were made and adjusted. In turn, each stage of preliminary works was sent for consideration and agreed with Boeing specialists. During the second stage, a round-the-clock repair facility was set up in the hangar of the repair facility to repair the damage together with representatives of Boeing who arrived in Tashkent.
Taking into account the complexity of the repair, UAT and Boeing specialists are unanimous that careful preliminary preparation and coordination of actions, regardless of the scope of work, were positive factors that contributed to the execution of works in the shortest possible time and at the proper level.
In the course of the primary defection of the second Boeing 757-200 aircraft by SCAT, numerous corrosion damage to the underground fuselage of the rear luggage compartment was detected. As a result, a decision was made to remove the lower part of the rods on a mass scale using specially manufactured equipment to repair the damage to the tail part of the fuselage of the aircraft. Since the regulation provides for the alternate removal of each unit of the rods only after the completion of the full cycle of repair of the previously removed profiled part and its installation or replacement, these works are lengthy and time-consuming. In order to regulate and check the results during the whole period of works the detailed assessment of reliability by non-destructive control methods was carried out.
The great interest of UAT specialists, caused by the development of a new type of repair and a large amount of work on removal of corrosion products, as well as the possibility of continuing cooperation with a long-term and reliable partner, has served as a stimulus and catalyst in the performance of works at a high level, once again confirming not only the capabilities of production facilities of the airline, but also the qualified training of engineering staff.