Airworthiness Directive · Amendment 39-13401 · Agusta S.p.A. Model A109E Helicopters
Agusta S.p.A. Model A109E Helicopters
Model A109E helicopters, with a main rotor head damper, part number (P/N) 109-0111-06-103, with a rod-end assembly, P/N 3637GR85, with a rod-end, P/N 3637-14, installed, certificated in any category.
This amendment adopts a new airworthiness directive (AD) for Agusta S.p.A. (Agusta) Model A109E helicopters. This action requires certain inspections of the rod-end of the main rotor head damper for freedom of movement, and depending on the torque required to move the rod-end, either further inspection for a crack or replacing the rod- end. This amendment is prompted by reports of rod-end fractures due to fatigue failure resulting in increased helicopter vibrations. This condition, if not corrected, could result in failure of the rod-end, extreme vibrations, and a subsequent forced landing or loss of control of the helicopter.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
Aircraft
