What does "preventive maintenance" involve?

Preventive maintenance involves regular inspections and servicing to identify and address potential issues before they lead to failures. This proactive approach is essential in aviation, where reliability and safety are paramount. By systematically checking and maintaining aircraft components, technicians can catch wear and tear early, replace worn parts, and perform necessary adjustments. This not only helps in maintaining the aircraft's performance but also extends its service life, reduces the likelihood of in-flight issues, and ensures passenger safety.

While other options describe important aspects of aircraft maintenance, they do not capture the essence of preventive maintenance, which focuses on ongoing upkeep rather than reactive measures, cleaning, or the introduction of new systems.