What should be done if fuel vapour is detected inside the aircraft?

When fuel vapour is detected inside the aircraft, the primary concern is the safety of all individuals on board. Evacuating passengers calmly is the appropriate course of action due to the potential risks associated with fuel vapours, which can be flammable and pose a health hazard. This step prioritizes ensuring that everyone leaves the potentially dangerous environment quickly and safely, allowing crew members to address the situation appropriately without risking the well-being of those on board.

In such scenarios, efficient evacuation is crucial to prevent accidents or health issues arising from exposure to hazardous vapours. While addressing fuel issues is important, the immediate safety of passengers must come first, which is why a calm and organized evacuation is the recommended response.