The appropriate way to handle a checklist after an interruption is to:

Handling a checklist after an interruption is important for ensuring safety and efficiency during flight operations. The appropriate approach is to maintain the checklist until the distraction is resolved. This means keeping the focus on the current context of the checklist, allowing interruptions to be dealt with without losing the flow of your operations.

By maintaining the checklist, you ensure that you don’t skip essential tasks that are part of your flight procedures, which could lead to safety risks. This approach allows you to pick up from where you left off once the distraction has been addressed. It promotes a systematic approach in the cockpit and prevents confusion that may arise from restarting or abandoning the checklist altogether.

Starting over from the beginning or using the last completed item as a reference may introduce errors or lead to missed items, as the pilot could easily overlook necessary steps taken just before the interruption. Putting the checklist away entirely could cause a loss of critical procedural knowledge needed for safe operation. Therefore, maintaining the checklist while resolving the distraction is crucial for effective and safe operations.