Which type of inspection is typically done after a specific number of flight hours?

The phase or hourly inspection is designed specifically to be performed after a set number of flight hours, making it essential for maintaining the safety and airworthiness of an aircraft. This type of inspection is part of a systematic, preventive maintenance program that ensures all systems and components are checked at regular intervals based on usage. It allows for the identification of wear and potential issues before they develop into more serious problems that could impact flight safety.

Incorporating regular phase or hourly inspections into maintenance schedules helps to ensure that each aspect of the aircraft is functioning properly. This practice reflects a commitment to safety and reliability in aviation operations, focusing on preventative measures to mitigate risks associated with malfunctioning equipment.

Annual inspections, on the other hand, are typically comprehensive checks that occur once a year regardless of flight hours. Walk-around inspections are more informal, focusing on visual checks before a flight rather than detailed maintenance procedures. Payload inspections involve checking the cargo and weight distribution but do not involve a comprehensive inspection of the aircraft’s systems and components as phase or hourly inspections do.