AD 2018-19-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Finmeccanica S.p.A. | Various | Airworthiness Directives; Leonardo S.p.A. (Type Certificate Previously Held by Finmeccanica S.p.A., AgustaWestland S.p.A) Helicopters |
Unsafe Condition
a crack on a tail gearbox fitting that could reduce the tail assembly's ability to sustain loads from the tail rotor gearbox (TGB) and the tail rotor and result in loss of helicopter control.
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Required Actions
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.
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Compliance Time
Within 30 hours time-in-service (TIS)
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Affected Aircraft
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.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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