When is it acceptable to perform a checklist?

Performing a checklist is essential for maintaining safety and operational efficiency in aviation. The correct scenario for executing a checklist is prior to taxi, when conditions are familiar. This is because conducting a checklist in a familiar environment allows crew members to confirm the aircraft's status and readiness without the distractions and potential hazards present during taxiing, especially when visibility is low or while navigating unfamiliar airports.

In familiar conditions, the crew can focus on ensuring that all necessary pre-flight checks are completed without the added pressure of maneuvering the aircraft on the ground. This practice enhances situational awareness and minimizes the chances of missing critical steps that could affect flight safety.

Other situations mentioned could compromise safety; for example, performing a checklist during taxi in low visibility may lead to distractions and hinder proper aircraft control. Similarly, addressing a checklist at unfamiliar airports can take attention away from navigating the environment, increasing the risk of errors. After an aborted takeoff, the crew needs to focus on managing the immediate situation rather than diverting attention to checklists. Thus, performing checklists in a calm, familiar setting before taxi is the most prudent choice.