FAR 1 defines a major repair as a repair that, if not performed correctly, can appreciably affect weight, balance, structural strength, performance, operation of the power plant, flight characteristics or other qualities affecting airworthiness, or that is not performed in accordance with accepted practices or cannot be performed. I) Conversion of an aircraft engine from one approved model to another, involving any change in the compression ratio, the reducing gear of the propeller, the impeller gear ratios or the replacement of the main parts of the engine, requiring extensive review and testing of the engine. If the FAA or a future purchaser of the aircraft might consider the repair you are making important, find out how to obtain the approved data. The aircraft flight manual and instructions for maintaining airworthiness (maintenance manuals, structural repair manuals, etc.) For certified aircraft, the FAA allows major modifications through many regulatory channels, but the two most common in the Georgia fleet are through a Form 337 or a Supplemental Type Certificate (STC).
During the inspection of major repairs or alterations, the owner of an AI must also determine that they are compatible with previous repairs and modifications that have been made to the aircraft. The scope of minor repairs covers everything else, except for major repairs specified in the aircraft maintenance manual, as well as any repair work affecting weight and balance, structural strength, performance, operation of the power plant and flight characteristics. Inspect and approve the return to service of any aircraft or related part or apparatus (except any aircraft maintained in accordance with a continuing airworthiness program in accordance with part 121 of this chapter) after a major repair or major modification thereto in accordance with part 43 of this chapter, if the work was performed in accordance with technical data approved by the Administrator. Therefore, it is obvious that repairs and alterations make up most of the maintenance performed on aircraft every day.
The manufacturer can only rebuild or modify the aircraft unless it is also certified as a repair station. Major alteration means an alteration that is not listed in the specifications of the aircraft, the aircraft engine or the propeller -. One of the main responsibilities of the owner of an AI is to determine airworthiness by inspecting repairs or alterations to verify that they comply with approved data and ensure that the aircraft is able to operate safely. Give the aircraft owner a maintenance authorization signed by an authorized repair station representative and enter the following information.
