What should be checked during the 100-hour inspection of an airplane with a push-pull tube-type control system?

During the 100-hour inspection of an airplane with a push-pull tube-type control system, it is essential to check the threaded rod ends for thread engagement. This is critical because the integrity of the threaded connections directly affects the performance and safety of the flight control system. Ensuring that the threads are properly engaged mitigates the risk of a control surface becoming disconnected or failing during operation, which could lead to catastrophic failure in flight.

The condition of the aileron fabric covering, while important for the overall airworthiness, does not specifically relate to the functionality of the push-pull tube control system. The overall functionality of the flight control surfaces is certainly a part of the inspection process, but it is more related to operational checks rather than a specific focus on the mechanical aspects of the control system. Similarly, checking the level of hydraulic fluid pertains to hydraulic systems, which may not apply to all push-pull tube systems and is not the primary concern during the inspection of these specific control mechanisms. Thus, ensuring the engagement of the threaded rod ends is a prioritized mechanical inspection task that directly supports safe operation of the aircraft.