Tue, Jun 09, 2020
AD 2020-12-02 Requires Re-Identifying Affected EC120B Tail Rotor Blades
The FAA is adopting a new airworthiness directive (AD) for all Airbus Helicopters Model EC120B helicopters.
This AD was prompted by a report that a changed manufacturing process for the tail rotor blades (TRB) was implemented, affecting the structural characteristics of the blades and generating a new part number for these blades. This AD requires re-identifying each affected TRB having a certain part number and serial number and establishing a life limit for the new part numbers. This AD also prohibits installation of any affected TRB identified with the old part number on any helicopter. The FAA is issuing this AD to address the unsafe condition on these products. This AD is effective July 13, 2020.
Supplementary Information: The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 by adding an AD that would apply to all Airbus Helicopters Model EC120B helicopters. The NPRM published in the Federal Register on March 11, 2020 (85 FR 14178). The NPRM was prompted by a report that a changed manufacturing process for the TRB was implemented, affecting the structural characteristics of the blades and generating a new part number for these blades. The NPRM proposed to require re-identifying each affected TRB having a certain part number and serial number and establishing a life limit for the new part numbers. The NPRM also proposed to prohibit installation of any affected TRB identified with the old part number on any helicopter. The FAA is issuing this AD to ensure the new part number (P/N) TRBs do not exceed their life limit, which could lead to loss of the TRB and subsequent loss of control of the helicopter.
The European Aviation Safety Agency (now European Union Aviation Safety Agency) (EASA), which is the Technical Agent for the Member States of the European Union, has issued EASA AD 2018-0183, dated August 28, 2018 (also referred to as the Mandatory Continuing Airworthiness Information, or “the MCAI”), to correct an unsafe condition for all Airbus Helicopters Model EC120B helicopters.
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