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During the annual/100 hour inspection the aircraft is “opened up” to the extent necessary to properly conduct the needed inspection requirements. This varies greatly between aircraft models. Airworthiness Directive (AD) applicability and compliance is researched and verified. The aircraft is checked for compliance with it’s FAA Type Certificate for required equipment and placarding. Supplemental Type Certificate (STC) installations are researched for proper installation and separate specialized inspection requirements. During this process routine lubrication and servicing is usually accomplished.
Point Aviation encourages owners to assist during the inspection as it is a great way to learn about your aircraft.