Which maintenance checks are crucial before flying the Warrior PA-28A?

The maintenance checks that are crucial before flying the Warrior PA-28A include checking oil levels, control surfaces, fuel systems, and navigation lights because these components are vital for the safe operation of the aircraft.

Oil levels are essential to ensure that the engine is adequately lubricated to prevent overheating and mechanical failure during flight. Control surfaces, such as ailerons, rudders, and elevators, need to be inspected for proper function and freedom of movement, as they are critical for controlling the aircraft’s flight path. Fuel systems must be checked to ensure there is an adequate supply of fuel and that there are no leaks, which could lead to catastrophic failure. Lastly, navigation lights are necessary for visibility, especially during low-light conditions or at night, ensuring that other pilots can see the aircraft and that the pilot has clear visibility of navigation during the flight.

While checking the landing gear and flaps, inspecting the cabin for passengers, and testing the radio and navigation systems are also important elements of pre-flight checks, they do not directly impact the immediate safety and effective operation of the aircraft in the same way as the items listed in the correct choice. Ensuring the fundamental operational integrity of the aircraft is paramount to guarantee a safe flight.