Which of the following is not an item to check before takeoff?

Before takeoff, it's essential for pilots and plane captains to conduct thorough checks to ensure the aircraft is ready for flight. This includes evaluating flight stability, fuel quantity, and weight and balance, as these factors are critical for safe operations.

Flight stability refers to the aircraft's ability to maintain controlled flight, which is crucial for safe takeoff. Fuel quantity is vital to ensure that there is enough fuel for the planned flight as running out of fuel mid-flight could lead to an emergency. Weight and balance checks are necessary to confirm that the aircraft is loaded within safe limits, which affects its handling and performance.

Cabin temperature, while important for passenger comfort, does not directly impact the safety and performance of the aircraft during takeoff. Therefore, checking cabin temperature is not as critical in the pre-takeoff assessment compared to the other items listed. This understanding helps prioritize the checks that truly influence the safety and functionality of the aircraft, reinforcing the importance of conducting thorough pre-flight preparations.