When it comes to aircraft, major repairs and alterations refer to modifications made to the main structure of the aircraft. These changes can have a significant impact on the structural integrity of the aircraft. The Federal Aviation Administration (FAA) outlines what is considered a major repair or alteration. For instance, small fabric repairs to the envelopes of balloons do not require repair or replacement of the charging tape as long as they are done in accordance with the balloon manufacturer's instructions.
However, if the repair involves an area larger than two adjacent ribs, then it is considered a major repair.Form 337, Major Repair and Alteration (Fuselage, Power Plant, Propeller, or Apparatus) is the documentation required for one-off repairs or modifications to an individual fuselage, engine, or propeller. This form must be filled out and submitted to the FAA for approval before any major repairs or alterations can be made. It is essential to understand what constitutes a major repair or alteration when it comes to aircraft. Knowing this information can help ensure that all necessary paperwork is filled out and submitted to the FAA before any repairs or modifications are made. In addition, it is important to note that any major repairs or alterations must be done in accordance with the manufacturer's instructions and approved by the FAA. This will help ensure that all repairs and modifications are done safely and correctly. Finally, it is important to keep in mind that any major repairs or alterations must be documented properly.
This includes filling out Form 337 and submitting it to the FAA for approval. This will help ensure that all repairs and modifications are done in accordance with FAA regulations.