Flight Controls – Rudder T-Yoke Axle Self-Locking Nut – Inspection
Superseded. Comply with 2023-0013R1, which replaces this document.
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of affected DA 42 aeroplanes must perform inspections of the rudder T-yoke axle self-locking nut within 100 flight hours or 12 months from 27 December 2019, and then at intervals not exceeding 200 flight hours or 12 months. If looseness is found, corrective actions and replacement of the nut must be completed before the next flight. Modification with the improved T-yoke axle part can be done to terminate repetitive inspections. Installation of affected parts is prohibited after modification or from the effective date for certain aircraft groups.
Summary
EASA Airworthiness Directive 2019-0302 is an airworthiness directive issued for Diamond Aircraft Industries GmbH DA 42 series aeroplanes, including DA 42, DA 42 M, DA 42 NG, and DA 42 M-NG models. The directive addresses the inspection and maintenance of the rudder T-yoke axle self-locking nut to ensure proper installation and prevent potential rudder control issues. It applies to all manufacturer serial numbers of these aircraft.
What changed
This directive introduces mandatory repetitive inspections of the rudder T-yoke axle self-locking nut for correct installation and requires corrective actions if looseness is detected. It also provides an optional terminating action involving modification with an improved T-yoke axle part number D60-5320-00-32. The directive prohibits installation of affected parts after modification or from the effective date for certain groups of aircraft.
Why it matters
This airworthiness directive is critical for maintaining safe rudder control on affected DA 42 aeroplanes by preventing vertical movement of the rudder T-yoke axle caused by a loose self-locking nut. Compliance ensures continued airworthiness and reduces the risk of control issues that could compromise flight safety. Operators, maintenance organizations, and compliance teams must adhere to these inspections and corrective actions to meet regulatory requirements and avoid operational disruptions.
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