Engine Controls – Push-Pull Control and Beta Switch – Inspection /; Replacement
Superseded. Comply with 2019-0244, which replaces this document.
- Published
- Effective
- Deadline
- Replaces
- 2018-0075
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must inspect and adjust the engine push-pull control and replace the Beta Switch on Group 1 engines within 25 flight hours, 20 flight cycles, or 30 days after 19 April 2018 if not already done. For all affected engines, inspections and adjustments must be performed before the next flight following any maintenance, repair, or modification affecting push-pull control settings. Installation of the older Beta Switch P/N P-S-2 is prohibited from specified dates depending on engine group.
Summary
EASA Airworthiness Directive 2019-0089 is an airworthiness directive issued by the European Union Aviation Safety Agency addressing safety concerns in 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 aircraft with Avia Propeller AV-725 propellers. The directive mandates inspections, adjustments, and modifications of the engine push-pull control and Beta Switch components to prevent inadvertent propeller pitch changes that could lead to loss of aircraft control.
What changed
EASA Airworthiness Directive 2019-0089 supersedes the previous AD 2018-0075 and expands its applicability to include H85-200 engine models. It introduces conditional repetitive inspections and adjustments of the push-pull control settings after maintenance, repair, or modification actions that could affect these settings. Additionally, it prohibits installation of the older Beta Switch P/N P-S-2 and requires replacement with an improved part.
Why it matters
This directive is critical for aviation professionals because it addresses a fatal accident caused by propeller control malfunction, ensuring continued safe operation of affected aircraft. Operators and maintenance organizations must comply to prevent reduced control or loss of control due to propeller pitch lock failure. Compliance ensures adherence to European regulations and maintains aircraft airworthiness.
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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.