AD 2025-18-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Leonardo | S.p.A. | Airworthiness Directives; Leonardo S.p.A. Helicopters |
Unsafe Condition
Improper torque values for swashplate nuts (part number NAS1805-4) could result in failure of the main rotor function and consequent loss of control of the helicopter.
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Required Actions
Repetitively inspect certain swashplate nuts for cracks, fretting, or slippage marks. Replace affected nuts and reconfigure the swashplate assembly as necessary. Reconfiguration of the swashplate assembly is a terminating action for the inspection requirements.
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Compliance Time
Within 200 flight hours after a replacement is required by inspection, or within 2,400 flight hours after the effective date if replacement is not required.
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Affected Aircraft
Leonardo S.p.A. Model A109E, A109S, AW109SP, A119, and AW119 MKII helicopters.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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