• The FAA has issued an airworthiness directive for MD Helicopters, LLC Model 369, 369A, 369D, 369E, 369F, 369FF, 369H, 369HE, 369HM, 369HS, 500N, and 600N helicopters.
• The directive requires repetitive inspections of the torque tube assembly and roller bearings.
• The FAA is taking this action to prevent failure of the torque tube assembly, which could result in reduced controllability and loss of control of the helicopter.

This airworthiness directive may indicate the FAA's growing concern about helicopter safety, particularly with regards to torque tube assemblies. The requirement for repetitive inspections suggests a proactive approach to addressing potential safety hazards, which could impact the maintenance and operational costs for MD Helicopters, LLC and its operators.