What characterizes a heavy or hangar maintenance service contract?

A heavy or hangar maintenance service contract is characterized by major scheduled maintenance requiring specialized training. This type of maintenance is more extensive than routine checks and often involves a thorough inspection of the aircraft along with repairs or replacements of significant components. The processes involved in heavy maintenance demand highly skilled technicians who possess specialized training to ensure compliance with safety regulations and operational standards.

Heavy maintenance typically occurs at specified intervals to ensure the safety and reliability of the aircraft. It includes detailed inspections, overhaul of engines and systems, and other significant repairs that cannot be accomplished during regular light maintenance checks. These activities are often mandated by aviation regulatory authorities and are crucial for maintaining the airworthiness of the aircraft.

In contrast to more minor maintenance activities that might be performed on a day-to-day basis, heavy maintenance is a comprehensive approach that ensures that all aspects of the aircraft are carefully evaluated and serviced.