What Happened
Cracking in Tail Rotor Supports Prompts Mandatory Inspections
The Federal Aviation Administration (FAA) has issued an airworthiness directive for all Airbus Helicopters Model AS355E, AS355F, AS355F1, AS355F2, and AS355N helicopters. The directive, effective September 17, 2026, requires repetitively inspecting the side supports of the tail rotor transmission fan for cracks and, depending on the results, replacing both side supports. This action is prompted by reports of cracks in the legs of the side supports, which could lead to failure of the engine and main gearbox cooling function, loss of the tail rotor drive, and consequent loss of control of the helicopter. The FAA is issuing this directive to address the unsafe condition on these products, as reported by the Federal Aviation Administration.