Main Rotor — Main Rotor Damper — Inspection / Replacement
- Published
- Effective
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What to do
Operators and maintenance teams should review the inspection and replacement procedures outlined in the document and incorporate them into their maintenance programs. They must perform the required inspections and replace the main rotor damper as specified. Any compliance deadlines stated in the document should be strictly observed to maintain regulatory compliance.
Summary
The document titled 'Main Rotor — Main Rotor Damper — Inspection / Replacement' applies to LEONARDO S.p.A. HELICOPTERS models AB139 and AW139. It provides instructions for inspecting and replacing the main rotor damper to ensure continued airworthiness and safe operation of these helicopter models. The directive focuses on maintaining the integrity of the main rotor system components.
What changed
This document introduces mandatory inspection and replacement procedures for the main rotor damper on the AB139 and AW139 helicopters. It establishes specific criteria and intervals for these inspections and replacements to prevent potential failures. This is a new regulatory requirement aimed at enhancing rotor system reliability.
Why it matters
This directive is critical for aviation professionals as it directly impacts the safety and maintenance schedules of the AB139 and AW139 helicopters. Operators and maintenance organizations must comply to avoid in-flight failures related to the main rotor damper, which could compromise flight safety. Compliance ensures continued airworthiness and reduces the risk of costly unscheduled repairs.
More for Leonardo S.P.A. Helicopters AB139
All 46- EASA AD 2020-0271R1Main Rotor – Swashplate Boot – InspectionOct 8, 2026
- EASA AD 2025-0094R2Electrical Power – Overhead Panel Wires Interference – Inspection / ModificationAug 26, 2026
- EASA AD 2026-0165Engine Exhaust – Nozzle Exhaust Duct Clamp Assembly – InspectionAug 18, 2026
- EASA AD 2025-0094R1Electrical Power – Overhead Panel Wires Interference – Inspection / ModificationJul 3, 2026
- EASA AD 2026-0003Time Limits / Maintenance Checks — Airworthiness Limitations Section — Amendment
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