Essential for preventive maintenance.
These type of parts need to be changed after certain flight hours. When the propellers are placed or removed, the contact surface will be wear out and the blades begin to have some clearance. It is because of the material in which the piece is made, so be careful not force these pieces. It is essential to have stock for the change in order to keep the aircraft in perfect condition.
Reviewed by: (Verified Buyer) Dario Lindo Andres from León, Spain. on 5/23/2017