Rotors Flight Control – Tail Rotor Actuator – Inspection
Superseded. Comply with 2022-0086, which replaces this document.
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of MBB-BK117 C-2 helicopters must perform initial and repetitive inspections of the tail rotor actuator bolts within specified flight hour intervals, as detailed in the directive's compliance table. If bolt wear below the minimum diameter is found, corrective actions must be taken promptly according to the Airbus Helicopters Alert Service Bulletin. Inspection results must be reported to Airbus Helicopters within 30 days of inspection or the effective date of the AD. Installation of affected parts is only allowed if they meet serviceability criteria and are inspected accordingly.
Summary
EASA Airworthiness Directive 2019-0313 is an airworthiness directive issued by the European Union Aviation Safety Agency affecting all serial numbers of the MBB-BK117 C-2 helicopters manufactured by Airbus Helicopters Deutschland GmbH. The directive addresses the inspection and maintenance of the tail rotor actuator assembly, specifically focusing on bolts connecting the cardan-pivot joint with the piston rod, to prevent potential bolt failure. This AD mandates repetitive inspections and corrective actions to ensure continued airworthiness and safety of the affected helicopters.
What changed
EASA Airworthiness Directive 2019-0313 introduces mandatory repetitive inspections of the tail rotor actuator bolts on MBB-BK117 C-2 helicopters to detect wear and prevent failure. It also requires reporting inspection results to Airbus Helicopters Deutschland GmbH and allows installation of serviceable parts under defined conditions. This AD does not supersede any previous directives but establishes new inspection and maintenance requirements.
Why it matters
This directive is critical for aviation professionals as it addresses a potential unsafe condition that could lead to loss of helicopter control due to bolt failure in the tail rotor actuator. Operators and maintenance organizations must comply to ensure flight safety and regulatory compliance. The directive also provides clear guidance on inspection intervals and corrective actions, helping maintenance teams plan and execute necessary tasks efficiently.
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