Producing countries assault in the US where the F-35 aircraft from Turkey, does not fall off the agenda with the errors found. The Joint Strike Fighter Program Office in the US reported in a report in February that it detected 883 design errors in one of today’s most expensive aircraft, the F-35. It is stated that in the fifth generation fighter aircraft F-35, which is referred to as the “most powerful fighter aircraft in the world”, 448 of 883 design errors have not been resolved yet. The errors included in the report include the mistakes that companies, who have contributed to the design of the aircraft, do not see as a malfunction, especially the aircraft manufacturer Lockheed Martin. Expressing that the aircraft was produced in accordance with the specifications of the project, Lockheed Martin stated that additional prices should be added to the project contract to correct these design errors. 162 Error Cannot be Fixed According to the statement made in the report, it is stated that there is not even a correction plan for the 162 design errors still in progress. It was announced that the manufacturer companies do not have the option to correct these errors. It was announced that funds were expected to eliminate the other 273 design errors. In addition, even if funds are provided, testing should be done for a long time to eliminate these errors. Apart from these errors, it was stated that the next modernization process of 10 design errors detected by F-35 engineers is expected. F-35s, whose production process has been going on for about 20 years, have been used in some tasks for the last few years. Even though the plane started its duties slowly, it seems that it could not deliver what was promised considering its price.