Flight Controls - Aileron Fixed Balance Weights - Replacement
- Published
- Effective
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of Honda Model HA-420 airplanes must replace the affected left and right aileron fixed balance weights with reduced geometry fixed balance weights by February 17, 2026. If interference is detected during clearance checks, replacement must occur before further flight. Stakeholders should refer to Honda Aircraft Company Service Bulletin No. SB-420-27-011, Revision B, for detailed instructions and ensure all maintenance complies with FAA-approved procedures.
Summary
EASA AD US-2026-01-01 is a final airworthiness directive issued by the FAA addressing certain Honda Aircraft Company LLC Model HA-420 airplanes. It mandates the replacement of the left and right aileron fixed balance weights with reduced geometry fixed balance weights due to insufficient clearance between the trailing edge wing nut plates and leading edge aileron balance weights. This action aims to prevent potential contact that could damage the airplane.
What changed
This new airworthiness directive introduces a mandatory replacement of the affected aileron fixed balance weights with reduced geometry versions to ensure minimum required clearance is maintained. It also clarifies that the replacement must be done before further flight for airplanes found with interference during clearance checks. The AD incorporates Honda Aircraft Company Service Bulletin No. SB-420-27-011, Revision B, dated December 12, 2024, as the approved procedure for compliance.
Why it matters
This directive is critical for aviation professionals as it addresses a safety risk that could lead to damage or loss of control of the airplane if the aileron balance weights interfere with wing nut plates. Operators and maintenance organizations must ensure compliance to maintain aircraft airworthiness and avoid potential in-flight control issues. The AD also highlights the importance of using FAA-approved procedures for proper aileron balancing to prevent further complications.
More for Honda Aircraft Company HA-420
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