AD 2014-02-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Agusta | S.p.A. | Airworthiness Directives; Agusta S.p.A. Helicopters |
Unsafe Condition
A crack in the main rotor swashplate outer ring (part number 412-010-407-105), caused by fatigue, could result in the loss of main rotor blade pitch control and subsequent loss of helicopter control.
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Required Actions
Visually inspect the swashplate outer ring (P/N 412-010-407-105) for cracks using a 5X magnifying glass and bright light within 5 flight hours time-in-service (TIS), and thereafter at intervals not exceeding 25 flight hours TIS. Remove the outer ring from service if a crack is found. Remove all outer rings (P/N 412-010-407-105) from service within 300 flight hours or 8 months, whichever occurs first. Do not install outer rings (P/N 412-010-407-105) on any helicopter.
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Compliance Time
Within 5 flight hours for initial inspection, and thereafter at intervals not exceeding 25 flight hours. Removal of all outer rings (P/N 412-010-407-105) must occur within 300 flight hours or 8 months, whichever occurs first.
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Affected Aircraft
Agusta S.p.A. Model AB412 helicopters with a swashplate outer ring part number (P/N) 412-010-407-105 installed, certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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