Engine Controls — Push-pull Control and Beta Switch — Inspection / Replacement
- Published
- Effective
- Deadline
- Replaces
- 2019-0244
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Affected operators must inspect and adjust push-pull controls and replace beta switches within specified flight hours, cycles, or calendar days as detailed in the directive. They must perform inspections before flights following maintenance affecting push-pull control settings and install improved parts within nine months of the directive's effective date. Repetitive inspections are required at defined intervals unless terminating actions are achieved by consecutive defect-free inspections.
Summary
EASA Airworthiness Directive 2020-0143 is an airworthiness directive addressing engine controls, specifically the push-pull control and beta switch, for GE Aviation Czech H80-200 and H85-200 engines installed on Aircraft Industries L 410 UVP-E20, L 410 UVP-E20 CARGO, and L 410 NG aeroplanes. The directive mandates inspections, adjustments, and replacements of specific push-pull control parts and beta switches to ensure safe engine operation and prevent uncommanded propeller reverse thrust. It applies to various engine groups defined by part numbers and configurations.
What changed
This directive supersedes EASA AD 2019-0244 and introduces updated inspection and modification requirements based on improved service bulletins from GE Aviation Czech. It requires installation of improved push-pull controls and beta switches, clarifies inspection procedures, and adjusts inspection intervals. The directive also removes repetitive inspections for certain engines and provides terminating actions after consecutive successful inspections.
Why it matters
This directive is critical for aviation professionals as it addresses a fatal accident cause related to propeller control malfunction, which could lead to loss of aircraft control. Operators and maintenance organizations must comply to maintain airworthiness and ensure flight safety. The updated requirements reduce the risk of inadvertent propeller reverse thrust and improve reliability of engine control systems, impacting maintenance planning and parts management.
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New ADs and bulletins for Ge Aviation Czech H75, H80, H85, Aircraft Industries L 410 UVP-E20, Aircraft Industries L 410 UVP-E20 CARGO and Aircraft Industries L 410 NG, summarized like this page, every Monday.