Tail Rotor – Tail Rotor Servo Actuator / Duplex Bearing – Inspection /; Check
Superseded. Comply with 2020-0048, which replaces this document.
- Published
- Effective
- Deadline
- Replaces
- 2019-0121R1
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators and maintenance organizations must perform repetitive inspections of the tail rotor servo actuator nut and duplex bearing within specified flight hour intervals, install and monitor thermal strips, and report findings including HUMS data when applicable. Corrective actions must be taken before the next flight if any discrepancies or abnormal conditions are detected. Compliance deadlines include initial inspections within 10 flight hours or 20 flight hours depending on group classification, with ongoing repetitive inspections at intervals defined in the directive.
Summary
EASA Airworthiness Directive 2019-0193 is an airworthiness directive issued by the European Union Aviation Safety Agency affecting all serial numbers of Leonardo S.p.A. AW169 and AW189 helicopters. The directive addresses inspections and monitoring of the tail rotor servo actuator and duplex bearing to prevent potential loss of yaw control. It mandates repetitive inspections, thermal strip installations, and reporting requirements to ensure continued airworthiness and safety of these helicopter models.
What changed
EASA AD 2019-0193 supersedes the previous AD 2019-0121R1 and introduces a revised reporting regime including the reporting of Health and Usage Monitoring System (HUMS) data for helicopters equipped with the applicable HUMS retro-mod. It retains previous inspection and corrective action requirements while updating inspection intervals and methods based on new findings and fleet feedback.
Why it matters
This directive is critical for aviation professionals as it ensures the early detection and correction of potential failures in the tail rotor servo actuator and duplex bearing, which are vital for helicopter yaw control. Compliance helps prevent accidents related to loss of control, supports fleet safety monitoring, and aligns maintenance practices with the latest safety data and manufacturer guidance.
More for Leonardo S.P.A. Helicopters AW169
All 26- EASA AD 2026-0187Equipment / Furnishing – Cargo Hook Barrel Nuts and Retainers – InspectionSep 29, 2026
- EASA PAD 26-099Equipment / Furnishing – Cargo Hook Barrel Nuts and Retainers – InspectionAug 31, 2026
- EASA AD 2025-0051R1Equipment / Furnishings — Hoist — ReplacementMay 7, 2025
- EASA AD 2023-0188-EEquipment / Furnishings — Float Assemblies — ReplacementOct 30, 2023
- EASA AD 2023-0160Time Limits / Maintenance Checks — Airworthiness Limitations Section — Amendment
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New ADs and bulletins for Leonardo S.P.A. Helicopters AW169, S.P.A. Helicopters AW189, AW169 and AW189, summarized like this page, every Monday.