AD 2019-05-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Leonardo | S.p.A. | Airworthiness Directives; Leonardo S.p.A. Helicopters |
Unsafe Condition
A report of a failed T/R duplex bearing roughness inspection revealed that one of the bearing balls installed in the T/R duplex bearing did not conform to design and that a batch of T/R duplex bearings has been identified that may be affected by the same nonconformity.
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Required Actions
Remove from service certain serial-numbered T/R duplex bearings with part number (P/N) 3G6430V00153 installed on Model AB139 and AW139 helicopters and certain serial-numbered T/R duplex bearings with P/N 4F6430V00551 installed on Model AW169 and AW189 helicopters.
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Compliance Time
Before further flight
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Affected Aircraft
Leonardo S.p.A. Model AB139, AW139, AW169, and AW189 helicopters with certain serial-numbered T/R duplex bearings.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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