AD 2021-18-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Leonardo | S.p.a. | Airworthiness Directives; Leonardo S.p.a. Helicopters |
Unsafe Condition
Failure to comply with the new life limit could lead to the failure of the part, possibly resulting in damage of the helicopter and injuries to passengers.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
For high landing gear aft crosstube P/Ns 412-050-010-101, 412-050-010-107, 412-050-010-111, and 412-050-045-107, this AD requires determining the total number of landings. If the total number of landings cannot be determined, this AD requires multiplying the total hours time-in-service accumulated by the high landing gear aft crosstube by 4. If the high landing gear aft crosstube has accumulated or exceeded 10,000 total landings, this AD requires removing the high landing gear aft crosstube from service. This AD also requires creating a component history card or equivalent record to establish a life limit of 10,000 total landings, and thereafter, removing any high landing gear aft crosstube from service before accumulating 10,000 total landings.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before accumulating 10,000 total landings
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Leonardo S.p.A. Model AB412 and AB412 EP helicopters with high skid landing gear assemblies part number (P/N) 412-050-012-(XXX), 412-050-014-(XXX), 412-050-050-(XXX), or 412-050-059-(XXX), where `XXX' represents any 3-digit combination, installed.
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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