How many fuel sumps does a Cessna 172 have, and where are they located?

The Cessna 172 is equipped with three fuel sumps, which include one located on each wing and an additional one positioned at the bottom of the engine. This design is essential for ensuring that fuel quality can be checked before flight. Sumps are placed in these locations to allow for the collection and inspection of fuel for any contaminants, such as water and sediment, which can affect engine performance.

The presence of one sump on each wing assists in monitoring the fuel system for contamination that could settle at the lowest point of the fuel tank, while the sump at the bottom of the engine can catch any contaminants that may accumulate along the fuel path. Regular checks of these sumps are a critical part of pre-flight procedures and contribute to overall safety by ensuring that the fuel is clear and free of impurities.