What should be checked regarding the on-board wheelchair during the preflight procedure?

Ensuring that the on-board wheelchair is present during the preflight procedure is crucial for passenger safety and comfort. If a passenger with mobility issues needs assistance, the absence of the wheelchair would prevent them from being accommodated properly, which could lead to significant delays or potential safety hazards.

While operational status, availability of a manual, and cleanliness may also be important, the fundamental prerequisite is that the wheelchair must be on board. A wheelchair that is not present cannot be operational or meet any other requirements. Thus, confirming its presence is the first step in providing effective support for passengers who may require it.