Airworthiness directives › 2021-09-07
AD 2021-09-07 Airworthiness Directives; Airbus Helicopters Deutschland GmbH Helicopters
Applicability*9
This AD applies to Airbus Helicopters Deutschland GmbH Model EC135P1, EC135P2, EC135P2+, EC135P3, EC135T1, EC135T2, EC135T2+, and EC135T3 helicopters, certificated in any category, with any of the part numbers specified in paragraphs (c)(1) through (3) of this AD installed. (1) Longitudinal single-axis actuator part number (P/N) L673M20A1008 or P/N L673M30A2111. (2) Collective single‐axis actuator P/N L673M20A1012, P/N L673M30A1211, or P/N E673M30A1201. (3) Lateral single‐axis actuator P/N L673M20A1011 or P/N L673M30A2311.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Except as specified in paragraph (h) of this AD: Comply with all required actions and compliance times specified in, and in accordance with, European Union Aviation Safety Agency (EASA) AD 2020-0105, dated May 11, 2020 (EASA AD 2020-0105).
Unsafe condition
This AD was prompted by a hard landing of an Airbus Helicopters Deutschland GmbH Model EC135 helicopter and 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 a ruptured and displaced tie bar inside the piston of a longitudinal, collective, or lateral single-axis actuator of the MRA, which could result in reduced control of the helicopter and could result in a forced landing with consequent damage to the helicopter and injury to occupants.
Affected ADs
This AD replaces AD 2019-17-02, Amendment 39-19722 (84 FR 47410, September 10, 2019) (AD 2019-17-02).
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