Old helicopters must now retire their main rotor shafts sooner

The FAA proposes to lower the safe operating life for main rotor shafts on several older helicopter models. This means some helicopters will need to replace a critical part or be taken out of service earlier than planned.

The FAA found that the main rotor shafts on these older helicopters are wearing out faster than expected. This change forces operators to replace parts based on new, shorter life limits, which directly affects the cost of keeping these older aircraft flying. It also means that some helicopters will be retired from service sooner, reducing the available fleet for certain operations.