Engine — Propeller Gearbox Magnetic Plug — Inspection / Propeller Shaft — Replacement
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of Evektor SportStar RTC aeroplanes with Rotax 912 ULS engines must inspect the magnetic plug before the next flight after 11 October 2023 and every 10 flight hours thereafter. If discrepancies are found, the affected propeller shaft must be replaced before the next flight. All affected parts must be replaced within 50 flight hours or 10 days after the effective date, whichever is later, and installation of affected parts is prohibited from the effective date.
Summary
EASA Airworthiness Directive 2023-0177-E is an emergency directive addressing certain Evektor SportStar RTC aeroplanes equipped with BRP-Rotax 912 ULS engines. It mandates inspection and replacement of propeller shafts with Part Number 937047 that were found to have machining defects. The directive aims to prevent engine failures caused by increased wear on propeller shaft bearings.
What changed
This new directive introduces mandatory repetitive inspections of the magnetic plug on affected engines to detect gearbox issues and requires replacement of defective propeller shafts before specified flight hour limits or within 10 days of the effective date. It also prohibits installation or reinstallation of affected parts on any engine or aeroplane.
Why it matters
This directive is critical for aviation professionals to prevent potential in-flight engine shutdowns that could lead to emergency landings and possible injuries. Operators and maintenance organizations must ensure compliance to maintain airworthiness and avoid operational disruptions. It also clarifies the affected serial numbers and parts to streamline identification and corrective actions.
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