Main Rotor Drive — Freewheel Lubrication System — Modification / Inspection / Cleaning
- Published
- Effective
- Deadline
- Replaces
- 2016-0117
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of AB206A and AB206B helicopters must modify the freewheel oil supply system within 100 flight hours or 6 months after 1 July 2016 if not previously modified. They must also inspect and clean the freewheel oil supply line within the same timeframe and perform inspections during each maintenance visit when the oil supply line is opened, following Leonardo BT 206-251 Rev. B instructions. Any discrepancies found must be corrected before the next flight.
Summary
EASA Airworthiness Directive 2018-0028 is an airworthiness directive addressing the main rotor drive freewheel lubrication system on Leonardo S.p.A. AB206A and AB206B helicopters. It mandates modification, inspection, and cleaning of the freewheel oil supply line to prevent blockages caused by debris, which could impair lubrication and potentially reduce helicopter control.
What changed
This directive supersedes EASA AD 2016-0117 and updates the inspection requirements by specifying that inspections of the freewheel oil supply line are only necessary following disconnection of certain components. It introduces non-periodic inspections during maintenance visits when the oil supply line is opened and revises the applicable technical instructions to Leonardo BT 206-251 Revision B.
Why it matters
This directive is critical for aviation professionals as it addresses a safety risk related to freewheel lubrication system blockages that could lead to internal damage and reduced helicopter control. Operators and maintenance organizations must ensure compliance to maintain airworthiness and prevent potential in-flight failures, thereby safeguarding crew and passengers.
More for Leonardo S.P.A. Helicopters AB206
All 5- EASA AD 2024-0109-CNCANCELLED: Flight Controls — Tail Rotor Control Tube — Inspection / ReplacementJun 6, 2024
- EASA AD 2022-0221Tail Rotor — Drive Shaft — Inspection / TestNov 16, 2022
- EASA AD 2019-0178-EMain Rotor — Main Rotor Blades — InspectionJul 19, 2019
- EASA AD 2018-0175-EEngine — Power Turbine Limitations — Operational LimitationAug 15, 2018
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