Superseded. This AD was superseded by AD 2020-18-19. Verify which one applies to your serial and effectivity before any maintenance action.
AD 2014-12-07
Effective 07/07/2014 · Published 06/19/2014
Airworthiness Directives; Agusta S.p.A. Helicopters
Summary
We are adopting a new airworthiness directive (AD) for Agusta S.p.A. (Agusta) Model AB412 and AB412EP helicopters with a certain rotor brake pinion installed. This AD requires inspecting the rotor brake pinion for a crack, and replacing it if there is a crack. This AD is prompted by a report of a rotor brake pinion failure. These actions are intended to detect a crack on the rotor brake pinion and prevent failure of…