AD 2020-03-13
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Leonardo | S.p.A. | Airworthiness Directives; Leonardo S.p.A. Helicopters |
Unsafe Condition
Reports of major leakage of hydraulic fluid in T/R dampers, which could result in degradation of T/R damper performance, T/R damage, and subsequent loss control of the helicopter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the hydraulic fluid level on each T/R damper within 10 hours time-in-service (TIS), and repeat the inspection at intervals not to exceed 10 hours TIS until the T/R damper accumulates 150 total hours TIS and has been installed for 12 or more consecutive months. Depending on the hydraulic fluid level, remove from service the affected T/R damper and email photographs of the sight window showing the hydraulic fluid level and certain information to Leonardo S.p.A Helicopters. After the effective date of this AD, following installation of an affected T/R damper, perform a ground run for at least 30 minutes, inspect the hydraulic fluid level, and repeat the hydraulic fluid level inspection at intervals not to exceed 10 hours TIS until the T/R damper accumulates 150 total hours TIS and has been installed for 12 consecutive months.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 10 hours time-in-service (TIS)
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Affected Aircraft
Leonardo S.p.A. Model AW189 helicopters with T/R damper part number (P/N) 4F640V00254 with a serial number (S/N) up to LK1229 inclusive.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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