Engine Controls – Push-pull Control and Beta Switch – Inspection /; Replacement
Superseded. Comply with 2020-0143, which replaces this document.
- Published
- Effective
- Deadline
- Replaces
- 2019-0089
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 within specified flight hours, cycles, or days depending on engine group. They must install the improved push-pull control within nine months of the AD's effective date and perform repetitive inspections every 100 flight hours or during scheduled maintenance. Installation of outdated parts is prohibited, and corrective actions must be taken before further flight if deficiencies are found.
Summary
EASA Airworthiness Directive 2019-0244 is an airworthiness directive addressing safety issues 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 aeroplanes. It mandates inspections, adjustments, and modifications of the engine push-pull control and beta switch components to prevent uncommanded propeller reverse and potential loss of aircraft control. The directive applies to specific engine configurations and propeller combinations.
What changed
EASA AD 2019-0244 supersedes the previous AD 2019-0089 and introduces the installation of improved engine push-pull controls (part numbers M601-76.5 or M601-76.4) to reduce the risk of uncommanded in-flight propeller reverse. It retains prior inspection and adjustment requirements and adds mandatory repetitive inspections with defined compliance intervals. The directive also prohibits installation of older beta switch and push-pull control parts after specified dates.
Why it matters
This directive is critical for aviation professionals as it addresses a fatal accident caused by propeller control malfunction, ensuring continued airworthiness and flight safety. Operators and maintenance organizations must comply to prevent potential loss of aircraft control due to propeller pitch lock failure. Compliance ensures regulatory adherence and reduces operational risk associated with affected engine and propeller combinations.
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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.