AD 2021-03-15
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Leonardo | S.p.a. | Airworthiness Directives; Leonardo S.p.a. Helicopters |
Unsafe Condition
The T/R duplex bearing P/N 129-0160-11-103 installed on certain Model A119 and AW119 MKII helicopters may have a loose or damaged T/R plug, which can cause the T/R duplex bearing to overheat and fail, leading to loss of control of the helicopter.
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Required Actions
Inspect the tightening torque of the T/R plug to a minimum of 30.5 Nm, inspect the outboard and inboard faces of the T/R duplex bearing for damage, inspect the T/R duplex bearing for rough rotation, brinelling, spalling, chipping, flaking, evidence of overheated bearing balls, and damage to the races, inspect the threads of the T/R plug and nut for damage, and if the nut has any damaged threads, remove the nut from service. Repeat these inspections at intervals not to exceed 200 hours TIS.
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Compliance Time
Before further flight
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Affected Aircraft
Leonardo Model A119 and AW119 MKII helicopters with a T/R duplex bearing P/N 129-0160-11-103 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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