Eurocopter EC 225 LP helicopters - Main Servo Control Check
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AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must inspect installed main servo controls with part numbers SC 7205-1, SC 7205-2, or SC 7206 and serial numbers 1 to 300 within 10 flight hours of the notice's effective date. Inspections include verifying the presence of the retaining ring and measuring the coupling tube dimension; non-compliant units must be replaced before further flight. Spare servo controls must be inspected before installation and within two months if already held in stock.
Summary
EASA Safety Information Notice No. 2007-46 addresses a manufacturing defect in the main servo control units of Eurocopter EC 225 LP helicopters. The defect involves incorrectly positioned retaining rings on the coupling tube of the servo control distributors, potentially causing untimely piston rod movement during hydraulic pressurization. This notice informs operators and maintenance personnel about the issue and references the French DGAC Emergency Airworthiness Directive UF-2007-022 for mandatory checks and replacements.
What changed
This new safety information highlights a manufacturing defect affecting main servo control units with specific part and serial numbers installed on EC 225 LP helicopters. It introduces mandatory visual inspections and dimensional checks of the retaining ring and coupling tube, requiring replacement of servo controls if non-conformities are found. The document clarifies that EASA does not have design approval authority over this issue, delegating regulatory enforcement to national authorities.
Why it matters
The defect can cause loss of control of the main servo control, posing a serious safety risk to helicopter operations. Aviation professionals must ensure compliance to prevent potential in-flight control failures. Maintenance and compliance teams need to prioritize inspections and replacements to maintain airworthiness and operational safety of affected EC 225 LP helicopters.
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