EASA Regulations for Enstrom Helicopter Corporation TH-28

Main Rotor - Rod End Bearing Assemblies - Inspection

Federal Register Volume 82, Number 243 (December 20, 2017) - Airworthiness Directive 2017-26-03 is a final rule issued by the FAA addressing Enstrom Helicopter Corporation models F-28, F-28A, F-28C, F-28C-2, F-28C-2R, F-28F, F-28F-R, TH-28, 280, 280C, 280F, 280FX, 480, and 480B. This directive mandates inspection of specific main rotor rod end bearing assemblies to detect corrosion and prevent potential failure that could lead to loss of a main rotor blade. The directive was prompted by an accident involving an Enstrom Model 480B helicopter.