AD 2023-07-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Aviat | Various | Airworthiness Directives; Leonardo S.p.a. Helicopters |
Unsafe Condition
a fatigue crack in a left-hand (LH) fin spar cap, a loose or missing rivet, damage, or distortion, which could result in stress concentrations at the edge of the rivet hole, possibly resulting in reduced structural integrity of the fin spar and subsequent loss of control of the helicopter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
clean and repetitively inspect certain part-numbered LH fin spar caps for a crack, loose rivet, and other damage, and repetitively inspect the exterior of the fin skin in the area in contact with the fin spar cap for a crack, loose rivet, and distortion. If any discrepancy is detected, contact Leonardo S.p.A. for approved repair instructions and accomplish the repair. Additionally, prohibit certain corrective actions as terminating action for the repetitive inspections, unless stated otherwise in the repair instructions.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight
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Affected Aircraft
Leonardo S.p.a. Model AB412 and AB412 EP helicopters, all serial numbers.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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