Base Maintenance Explained: Heavy Aircraft Maintenance and Overhauls Base maintenance refers to extensive, detailed maintenance performed on an aircraft while it is grounded for a longer period. Unlike line maintenance, which is quick and routine, base maintenance occurs in hangars and involves deep inspections, major system checks, and component overhauls. Base maintenance includes heavy inspections, system checks, and component overhauls to ensure aircraft safety and airworthiness Base maintenance is essential to ensure the long-term safety, reliability, and airworthiness of the aircraft. What Is Base Maintenance? Base maintenance includes all heavy and detailed maintenance activities that cannot be completed quickly on the ramp. It is often part of a scheduled maintenance program and may include major checks, structural inspections, and component replacements or overhauls. Aircraft are typically taken to dedicated maintenance hangars equipped with specialized t...