Airbus helicopters must get new main gearbox bolts, replacing a temporary fix

The US aviation regulator is proposing to replace an earlier temporary fix for certain Airbus helicopters. This means specific helicopter models will need a physical modification to their main gearbox suspension bars, not just inspections.

Aviation regulators often issue temporary fixes, like inspections or life limits, when a safety issue is found. This proposed rule means the manufacturer has developed a permanent engineering solution. It shifts the burden from ongoing checks to a one-time physical upgrade, which is a more durable fix for a critical component.