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Mon, Apr 26, 2021

AD: Airbus Helicopters Deutschland GmbH Helicopters

AD 2021-09-07 Continues To Require Inspecting Certain Part-Numbered Actuators

The FAA is superseding Airworthiness Directive (AD) 2019-17-02, which applied to certain Airbus Helicopters Deutschland GmbH (Airbus Helicopters) Model EC135P1, EC135P2, EC135P2+, EC135P3, EC135T1, EC135T2, EC135T2+, and EC135T3 helicopters.

AD 2019-17-02 required inspecting certain part-numbered actuators for corrosion, removing them as necessary, and reporting certain information. This new AD continues to require inspecting certain part-numbered actuators, removing them as necessary, and reporting; and extends the compliance time for the initial inspection, expands the applicability, and includes new requirements for repetitive replacement of affected actuators; as specified in a European Union Aviation Safety Agency (EASA) AD, which is incorporated by reference. This AD was prompted by a hard landing of a helicopter and the discovery of a ruptured and displaced tie bar inside the piston of the longitudinal single-axis actuator of the main rotor actuator (MRA). The FAA is issuing this AD to address the unsafe condition on these products. This AD becomes effective May 10, 2021.

Supplementary Information: The FAA issued AD 2019-17-02, Amendment 39-19722 (84 FR 47410, September 10, 2019) (AD 2019-17-02), which applied to Airbus Helicopters Deutschland GmbH Model EC135P1, EC135P2, EC135P2+, EC135P3, EC135T1, EC135T2, EC135T2+, and EC135T3 helicopters with certain longitudinal, collective, and lateral single-axis actuators installed having accumulated 6 or more years since manufacturing date or last overhaul, whichever occurred later. AD 2019-17-02 required visually inspecting for corrosion on all external surfaces of the longitudinal, collective, and lateral single-axis actuators, and based on the inspection outcome, removing the single-axis actuators from service at different compliance times. AD 2019-17-02 also required reporting certain information, along with photos of any corrosion, to Airbus Helicopters. The FAA issued AD 2019-17-02 to address corrosion in certain MRA components, which could result in failure of the component, failure of the MRA, and loss of control of the helicopter.

FMI: www.regulations.gov

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