Airbus helicopters must replace main gearbox bolts after reports of deformation

US aviation regulators are proposing a new rule for certain Airbus helicopters. This rule would require operators to replace specific bolts on the main gearbox suspension bar and report the inspection results.

This is a small, specific safety fix for a known problem. It means that operators of these particular helicopter models will have to spend money and time to replace parts and report data. The goal is to prevent future failures of a critical component.