Powerplant — Engine to Retractable Electric System Pylon Fasteners — Retightening
- Published
- Effective
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of JS-MD 3 RES sailplanes with serial numbers 3.MD185 to 3.MD209 must retighten the M8 fasteners attaching the engine to the RES pylon within 10 engine hours or 12 months from 24 January 2025. The retightening must be performed according to the instructions in paragraph 5.1 of the MD Mandatory Service Bulletin SB-MD11-004 and the related Work Instruction MD11-WOI-71-002.
Summary
EASA Airworthiness Directive 2025-0010 is an airworthiness directive issued by the European Union Aviation Safety Agency concerning M&D Flugzeugbau GmbH & Co. KG JS-MD 3 RES sailplanes, specifically serial numbers 3.MD185 through 3.MD209. The directive addresses the retightening of M8 fasteners that attach the engine to the Retractable Electric System (RES) pylon to ensure continued airworthiness and safety.
What changed
This new airworthiness directive introduces a mandatory one-time retightening of the affected M8 fasteners on the JS-MD 3 RES sailplanes. It requires compliance within 10 engine hours or 12 months from the effective date, following the instructions in the specified work instruction and service bulletin issued by M&D Flugzeugbau.
Why it matters
This directive is critical because incorrect torque and missing threadlocker on the engine-to-RES pylon fasteners could lead to engine and propeller separation, potentially causing structural damage, loss of control, and injury to persons on the ground. Operators, maintenance organizations, and compliance teams must address this unsafe condition promptly to maintain aircraft safety and regulatory compliance.
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