What should a flight attendant check before leaving an aircraft that is staying overnight?

Before a flight attendant leaves an aircraft that will be staying overnight, it is crucial to ensure that the exit doors are fully closed. This is an essential safety feature that prevents unauthorized access to the aircraft, protects the interior from the elements, and ensures that the aircraft is secure during its time on the ground. Leaving the doors potentially unsecured could pose a safety risk, allowing entry to unauthorized personnel or animals, and could lead to both theft and damage to the aircraft's interior.

While checking the security of passenger belongings, the availability of snacks for the next crew, and the readiness of emergency procedures are all valid considerations in their own right, the immediate priority is the physical security of the aircraft itself. Ensuring that exit doors are completely shut is a critical last step in ensuring the overall safety and integrity of the aircraft before leaving it unattended overnight.