Airworthiness directives › 2021-16-10
AD 2021-16-10 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 tail rotor blade (TRB) part numbers specified in paragraphs (c)(1) through (5) of this AD installed. (1) Part number (P/N) L642A2002101. (2) P/N L642A2002103. (3) P/N L642A2002104. (4) P/N L642A2002111. (5) P/N L642A2002112.
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 2020-0282, dated December 17, 2020 (EASA AD 2020-0282).
Unsafe condition
This AD was prompted by a report that during an investigation related to an accident on an Airbus Helicopters Model EC130B4 helicopter, geometrical non-conformities were observed in the TRB root section. The FAA is issuing this AD to address geometrical non-conformities in the TRB root section, which could lead to crack initiation and consequent blade failure, resulting in loss of control of the helicopter.
Affected ADs
None.
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