What should be done immediately if any hazard is identified during the airstair retraction process?

When a hazard is identified during the airstair retraction process, the immediate response should be to stop the retraction. This action is crucial because it prevents any potential accidents or injuries that could arise from continuing with the process while a hazard exists. Stopping the operation allows for a safe assessment of the situation without putting personnel or equipment at further risk.

Additionally, halting the retraction gives the crew time to evaluate the hazard thoroughly and decide on the appropriate next steps, whether that means alerting ground staff or taking other safety measures. Prioritizing safety above all else is a fundamental principle, particularly in aviation operations where many factors are at play.

In contrast, attempting to fix the issue or checking the power supply without first stopping could lead to unsafe conditions, while contacting ground staff may not be timely enough to prevent potential harm or damage.