Which of the following items must be confirmed while airborne?

The choice of confirming the thrust levers while airborne is particularly important for several reasons related to safety and operational efficiency. Thrust levers control the power produced by the engines, directly affecting the aircraft's performance, especially during critical phases such as climb, cruise, and descent.

During flight, pilots need to monitor and adjust thrust settings to ensure that the aircraft maintains the desired altitude and speed. This confirmation is essential to confirm that thrust levels are appropriate for current conditions, such as changes in air traffic control instructions, weather variations, or other factors that might necessitate adjustments. An incorrect thrust setting can lead to performance issues or unsafe flight conditions, making this confirmation vital for safe operation.

For the other items, while they are also important in their respective contexts, they may not carry the same immediacy or critical nature as the thrust levers do during flight. For instance, cabin pressure is typically monitored before takeoff and does not require confirmation in the same manner while airborne, as the systems are designed to maintain conditions automatically. Similarly, flaps position can be set prior to takeoff and are not adjusted again until landing, depending on the aircraft's design. Radio frequency is crucial for communication, but it may not require constant confirmation once set unless