Prevention of risks when working on an aircraft

The invention proposes to automate preventing risks during an operation on an aircraft, and relates to a prevention system comprising: - an identification module (3) configured to identify a set of zones at risk (21) in the aircraft (23) and its surroundings during a common operation on the aircraft by a set of operators (25), - a localization module (5) configured to locate a position of each operator (25) when the current procedure, and - an alarm module (7) configured to generate an alert when an operator is in a danger zone (21).