Airworthiness Directive · Amendment 39-19408 · Tail rotor gearbox
Leonardo S.p.A. (Type Certificate Previously Held by Finmeccanica S.p.A., AgustaWestland S.p.A) Helicopters
This AD applies to Leonardo S.p.A. (Type Certificate Previously Held by Finmeccanica S.p.A., AgustaWestland S.p.A.) Model AW189 helicopters, certificated in any category, with tail assembly part number 8G5350A00131 installed.
We are adopting a new airworthiness directive (AD) for Leonardo S.p.A. (Leonardo) Model AW189 helicopters. This AD requires inspecting the tail gearbox (TGB) fitting for a crack. This AD was prompted by a report of a crack on a TGB fitting that was found during a scheduled inspection. The actions of this AD are intended to prevent an unsafe condition on these products.
You are responsible for performing each action required by this AD within the specified compliance time unless it has already been accomplished prior to that time.
Within 30 hours time-in-service (TIS) and thereafter at intervals not to exceed 150 hours TIS, clean and inspect the TGB fitting for a crack in the areas depicted in Figure 1 of Leonardo Bollettino Tecnico No. 189-114, dated September 6, 2016. If there is a crack, replace the TGB fitting before further flight.
