AD 2021-14-18
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Agusta S.p.A. | Various | Airworthiness Directives; Leonardo S.p.a. (Type Certificate Previously Held by Agusta S.p.A.) Helicopters |
Unsafe Condition
Cracks in the tail rotor (T/R) blades, which could result in failure of a T/R blade and subsequent loss of control of the helicopter.
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Required Actions
Inspect the T/R blade for a crack and damage, using a figure in the related service information, and depending on the results, perform certain applicable corrections. Replace any cracked blade or any blade that has reached its life limit.
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Compliance Time
Within 50 flight hours
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Affected Aircraft
Leonardo S.p.a. (Type Certificate Previously Held by Agusta S.p.A.) Model AB139 and AW139 helicopters with a T/R blade part number (P/N) 3G6410A00131 or P/N 4G6410A00131 installed.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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