AD 2026-02-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Leonardo | S.p.a. | Airworthiness Directives; Leonardo S.p.a. Helicopters |
Unsafe Condition
Occurrences of a cracked main gearbox (MGB) support case have been reported on Leonardo S.p.a. Model AB412 and AB412EP helicopters. The MGB support case cracking can result in structural failure of the MGB support case and loss of control of the helicopter.
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Required Actions
Revising the existing rotorcraft flight manual (RFM) for the helicopter by incorporating the RFM revision identified within the material referenced in EASA AD 2024-0212, as applicable by helicopter model and serial number, informing all flight crews, and thereafter, operating the helicopter accordingly.
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Affected Aircraft
Leonardo S.p.a. Model AB412 and AB412EP helicopters
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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