Final answer:
The type of maintenance that includes regular cleaning of the aircraft as well as touch-up of protective paint coatings is called preventive maintenance.
Step-by-step explanation:
The type of maintenance that includes regular cleaning of the aircraft as well as touch-up of protective paint coatings is called preventive maintenance. Preventive maintenance is a proactive approach to ensure that an aircraft is well-maintained and operates efficiently. It involves regular inspections, cleaning, lubrication, and minor repairs to prevent any potential issues or damages.Regular cleaning of the aircraft helps remove dirt, dust, and other contaminants that may accumulate and affect the performance and lifespan of the aircraft. Touch-up of protective paint coatings is done to protect the aircraft from corrosion and damage caused by exposure to environmental factors like UV radiation, moisture, and chemicals.By regularly performing preventive maintenance, the aircraft's overall condition can be maintained, reducing the risk of major breakdowns and improving its longevity.