Fuel and Oil Checks

What happens here

As part of the pre-flight routine, the pilot demonstrates draining small samples of aviation fuel from various points under the wings and fuselage into a clear cup. This is to check for contaminants like water or sediment, which are denser than fuel and would settle at the bottom. He checks fuel levels using a dipstick tool and inspects the engine oil.

Goal: Ensure fuel and oil are free of contaminants and at correct levels.