FAA 2020-12-02

Requires re-identifying each tail rotor blade 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 tail rotor blade identified with the old part number on any helicopter. Prompted by a report that a changed manufacturing process for the tail rotor blades was implemented, affecting the structural characteristics of the blades and generating a new part number for these blades.